You searched for subject:(estrus synchronization).
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University of Arizona
1.
Fish, Ronald Dean.
Estrus Synchronization of Beef and Dairy Cows
.
Degree: 2011, University of Arizona
URL: http://hdl.handle.net/10150/217055 
► An estrus synchronization trial was conducted to determine the efficacy of adding an injection of gonadotropin releasing hormone (GnRH) at initiation of the controlled intravaginal…
(more)
▼ An
estrus synchronization trial was conducted to determine the efficacy of adding an injection of gonadotropin releasing hormone (GnRH) at initiation of the controlled intravaginal drug releasing device (CIDR®) progesterone
synchronization protocol in heifers. Nulliparous (n=121) beef heifers were randomly assigned to one of two treatment groups. All heifers received a CIDR® implant at the initiation of the breeding season. Half of the heifers (Select Synch) received an injection of GnRH. Heifers in the Select Synch treatment group had a lower numerical response (76.7% versus 88.3%) to treatment (detected in heat) and an overall lower artificial conception rate (46.0% versus 53.3%), but no statistical difference was detected. Days to conception and artificial insemination conception rates for both groups were similar for all heifers inseminated. Three hundred multiparous Hereford, crossbred and composite beef cows were assigned to one of two breeding groups (Early and Late) based on calving date and randomly assigned to receive an injection of GnRH at the time of CIDR® insertion (Select Synch). The addition of GnRH did not impact the percentage of cows detected in
estrus or days to conception. Conception rates were not affected by the addition of GnRH (Select Synch), however cows in the early breeding group were more likely to become pregnant (58% versus 45%) by artificial insemination (P<0.02). An experiment evaluated the efficacy of the CIDR® protocol to synchronize
estrus in Arizona Holstein dairy cows (n=696). Cows assigned to the CIDR® protocol (n=337) received a CIDR® insert at the end of the voluntary waiting period (55 days). CIDR®s were removed and an injection of prostaglandin was administered seven days after insertion. There was no difference due to CIDR® treatment in number of services per conception or first service conception rate. CIDR® treatment reduced days to first service, days open at first service, and days open (P<0.02). Warm season had a deleterious effect on number of services, days to first service, first service conception rate and days open (P<0.0001). In summary,
estrus synchronization improved postpartum reproductive performance; however, thermal stress continues to be a major barrier to reproductive efficiency.
Advisors/Committee Members: Marchello, John A (advisor), Collier, Robert J. (committeemember), Schafer, David W. (committeemember), Marchello, Elaine V. (committeemember), Marchello, John A. (committeemember), Franklin, James K. (committeemember).
Subjects/Keywords: progesterone;
Animal Sciences;
CIDR;
Estrus synchronization
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APA (6th Edition):
Fish, R. D. (2011). Estrus Synchronization of Beef and Dairy Cows
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/217055
Chicago Manual of Style (16th Edition):
Fish, Ronald Dean. “Estrus Synchronization of Beef and Dairy Cows
.” 2011. Doctoral Dissertation, University of Arizona. Accessed March 09, 2021.
http://hdl.handle.net/10150/217055.
MLA Handbook (7th Edition):
Fish, Ronald Dean. “Estrus Synchronization of Beef and Dairy Cows
.” 2011. Web. 09 Mar 2021.
Vancouver:
Fish RD. Estrus Synchronization of Beef and Dairy Cows
. [Internet] [Doctoral dissertation]. University of Arizona; 2011. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10150/217055.
Council of Science Editors:
Fish RD. Estrus Synchronization of Beef and Dairy Cows
. [Doctoral Dissertation]. University of Arizona; 2011. Available from: http://hdl.handle.net/10150/217055
2.
Holland, Sarah C.
Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle.
Degree: MS, Biomedical and Veterinary Sciences, 2015, Virginia Tech
URL: http://hdl.handle.net/10919/56575
► Prostaglandin F2α (PGF2α) is commonly given to female cattle intramuscularly (IM) for the synchronization of estrus. A novel site for administration of PGF2α that improves…
(more)
▼ Prostaglandin F2α (PGF2α) is commonly given to female cattle intramuscularly (IM) for the
synchronization of
estrus. A novel site for administration of PGF2α that improves beef quality assurance is the ischiorectal fossa (IRF). The objective of this study was to determine whether administration of PGF2α in the IRF results in a similar physiologic response to administration of PGF2α given IM.
Yearling angus-cross heifers (n=112) were blocked by weight and randomly assigned within blocks to be injected with 5 mL PGF2α either IM in the neck or in the IRF. Blood samples were taken at 0, 8, 16, 24, 36, and 48 h post-injection. Serum samples were analyzed for progesterone concentration using a radioimmunoassay. Progesterone concentration curves for each heifer were plotted to determine luteolysis. The median times to luteolysis for neck and IRF injections were 18.1 hrs and 20.0 hrs, respectively (p=0.06).
Angus cross commercial beef cows (n=1471) at least 30 days post-partum were blocked by age and randomly assigned to be injected with 5 mL PGF2α either IM in the neck muscle or in IRF as part of a 7-Day CO-Synch + CIDR ovulation protocol. Pregnancy diagnosis was performed via ultrasound at 60 days post insemination. Results were analyzed with Proc Glimmix (SAS). Pregnancy rates for neck and IRF injections were 52.6% and 57.2%, respectively (p=0.06).
In summary, injection of PGF2α in the IRF for
estrus synchronization and lysis of the corpus luteum did not differ from injection in the neck muscle. Utilizing the ischiorectal fossa as an injection site for PGF2α may be considered as an alternative that more closely aligns with beef quality assurance objectives.
Advisors/Committee Members: Swecker, William S. Jr. (committeechair), Whittier, William D. (committee member), Clark-Deener, Sherrie (committee member).
Subjects/Keywords: Prostaglandin; luteolysis; estrus synchronization; beef quality assurance
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APA (6th Edition):
Holland, S. C. (2015). Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/56575
Chicago Manual of Style (16th Edition):
Holland, Sarah C. “Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle.” 2015. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/56575.
MLA Handbook (7th Edition):
Holland, Sarah C. “Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle.” 2015. Web. 09 Mar 2021.
Vancouver:
Holland SC. Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle. [Internet] [Masters thesis]. Virginia Tech; 2015. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/56575.
Council of Science Editors:
Holland SC. Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle. [Masters Thesis]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/56575
University of Missouri – Columbia
3.
Nash, Justin Michael.
Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows.
Degree: 2011, University of Missouri – Columbia
URL: http://hdl.handle.net/10355/14559
► Estrus synchronization and artificial insemination are two of the most important management practices available to producers to increase reproductive performance in a beef cow-calf operation.…
(more)
▼ Estrus synchronization and artificial insemination are two of the most important management practices available to producers to increase reproductive performance in a beef cow-calf operation. Unfortunately, a small number of producers utilize these practices due to increased labor requirements. The use of fixed-time artificial insemination (FTAI) reduces the amount of time and labor required to detect
estrus, leading to decreased input requirements. The following experiments were performed in order to compare the use of long-term controlled internal drug release (CIDR) insert-based
estrus synchronization protocols prior to FTAI in estrous-cycling and anestrous postpartum beef cows. In experiments 1 and 2, two long-term CIDR-based
estrus synchronization protocols were compared on the basis of physiological characteristics, including serum steroid hormone concentrations, estrous response, and follicular dynamics, as well as pregnancy rates resulting from FTAI. From these intensive trials, it was determined that both protocols yielded comparable pregnancy rates and similar physiological responses when used in postpartum beef cows. In experiment 3, the use of either a long- or short-term CIDR-based
estrus synchronization protocol was compared prior to FTAI in a large-scale field trial. Results indicated that pregnancy rate resulting from FTAI was similar for both protocols. These data provide preliminary support for the use of long-term CIDR-based
estrus synchronization protocols prior to FTAI in postpartum beef cows.
Advisors/Committee Members: Patterson, David J. (David James), 1954- (advisor).
Subjects/Keywords: estrus synchronization; estrus detection; artificial insemination; beef cattle
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APA (6th Edition):
Nash, J. M. (2011). Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/14559
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nash, Justin Michael. “Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows.” 2011. Thesis, University of Missouri – Columbia. Accessed March 09, 2021.
http://hdl.handle.net/10355/14559.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nash, Justin Michael. “Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows.” 2011. Web. 09 Mar 2021.
Vancouver:
Nash JM. Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows. [Internet] [Thesis]. University of Missouri – Columbia; 2011. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10355/14559.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nash JM. Comparison of long-term CIDR-based protocols to synchronize estrus in postpartum beef cows. [Thesis]. University of Missouri – Columbia; 2011. Available from: http://hdl.handle.net/10355/14559
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
4.
Satterfield, Michael Carey.
Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes.
Degree: MS, Physiology of Reproduction, 2005, Texas A&M University
URL: http://hdl.handle.net/1969.1/1552
► A homogeneous group of thirty-one crossbred ewes was used to determine the effect of administering a progesterone Controlled Intravaginal Drug Releasing Device (CIDR) on circulating…
(more)
▼ A homogeneous group of thirty-one crossbred ewes was used to determine the
effect of administering a progesterone Controlled Intravaginal Drug Releasing
Device (CIDR) on circulating levels of progesterone in the subsequent cycle
following CIDR removal. Circulating progesterone levels were determined for each
ewe through daily blood collection via jugular venipuncture. Each ewe underwent a
pretreatment 25 day sampling period (Period 1), a 12 day treatment period
characterized by the presence of the CIDR (Period 2), and another 25 day sampling
period following CIDR removal (Period 3). During the initial period of the study,
progesterone levels in peripheral circulation changed (P < 0.0001, effect of day) in
accordance with stage of the estrous cycle and were elevated during the luteal phase.
In the second period of the study, progesterone levels were elevated (P < 0.0001) in
ewes due to exogenous progesterone from the CIDR device (Period 1 versus Period
2: 1.3 ± 0.1 ng/ml versus 2.4 ± 0.1 ng/ml, respectively). After withdrawal of the
CIDR in the third period of the study, circulating progesterone levels were not (P >
0.10) different from those observed in the initial period of the study (Period 1 versus
Period 3: 1.3 ± 0.1 ng/ml versus 1.4 ± 0.1 ng/ml, respectively). Data collected in
this study revealed that treatment with exogenous progesterone via CIDR for a 12-
day treatment period does not influence circulating levels of progesterone in
subsequent estrous cycles.
Advisors/Committee Members: Ramsey, Shawn (advisor), Spencer, Tom (advisor), Bretzlaff, Katherine (committee member).
Subjects/Keywords: sheep; CIDR; progesterone; estrus synchronization
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APA (6th Edition):
Satterfield, M. C. (2005). Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/1552
Chicago Manual of Style (16th Edition):
Satterfield, Michael Carey. “Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes.” 2005. Masters Thesis, Texas A&M University. Accessed March 09, 2021.
http://hdl.handle.net/1969.1/1552.
MLA Handbook (7th Edition):
Satterfield, Michael Carey. “Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes.” 2005. Web. 09 Mar 2021.
Vancouver:
Satterfield MC. Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes. [Internet] [Masters thesis]. Texas A&M University; 2005. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/1969.1/1552.
Council of Science Editors:
Satterfield MC. Evaluation of the effect of progesterone CIDR Devices on circulating levels of progesterone in cyclic ewes. [Masters Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/1552
Colorado State University
5.
Giles, Ryan.
Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows.
Degree: MS(M.S.), Animal Sciences, 2012, Colorado State University
URL: http://hdl.handle.net/10217/68105
► In the first experiment, objectives were to determine the effectiveness of an extended controlled internal drug release (CIDR) insert estrus synchronization protocol to produce 2…
(more)
▼ In the first experiment, objectives were to determine the effectiveness of an extended controlled internal drug release (CIDR) insert
estrus synchronization protocol to produce 2 follicular waves, induce cyclicity in anestrus cows, and evaluate the efficacy of a single 50 mg dose of prostaglandin F2α (PG) at CIDR removal. This experiment included 779 primiparous and multiparous lactating beef cows at 3 locations (n = 779) that were randomly assigned to 1 of 3 treatments. Cows in the 14-d 50 PG treatment received a CIDR (1.38 g progesterone) with 100 μg GnRH analogue im on d 0, 100 μg GnRH analogue im on d 9, and CIDR removal with 50 mg PG im on d 14. Cows in the 14-d 6 h PG treatment were assigned the same protocol as the 14-d 50 PG treatment except that 25 mg PG im was given on d 14, plus 25 mg PG im 6 ± 1 h later. Cows in the 5-day CO-Synch + CIDR (5-d CO-Synch) treatment, received a CIDR with 100 μg GnRH analogue im on d 9, CIDR removal with 25 mg PG im on d 14, and 25 mg PG im 6 ± 1 h after first PG injection. Cows in all treatments received 100 μg GnRH analogue im with TAI 72 ± 3 h after CIDR removal. Pregnancy status to TAI was determined by ultrasonography 37 to 40 d after TAI. Pregnancy rate to TAI was higher (P < 0.05) in 14-d 50 PG treatment than 14-d 6 h PG and 5-d CO-Synch treatments. In the following year, 2 experiments were conducted at 6 locations. Our objectives were to: 1) determine the efficacy of an extended CIDR protocol with 2 induced follicular waves, and 2) determine the ability of initiating the CIDR protocol with GnRH analogue (Factrel) or PG. In exp. one, 588 primiparous and multiparous lactating beef cows at 2 locations were randomly assigned to 1 of 3 treatments. Cows in the 14-d GnRH-9 treatment (n = 202) received the same treatment as the 14-d 50 PG as described earlier. Cows in the 14-d GnRH-7 treatment received a CIDR insert and 100 μg GnRH analogue im on d 0, 100 μg GnRH analogue im on d 7, and CIDR removal with 25 mg PG im on d 14. Cows in the 7-day CO-Synch + CIDR (7-d CO-Synch) treatment, received a CIDR insert and 100 μg GnRH analogue im on d 7, and CIDR removal concurrent with 25 mg PG im on d 14. Cows in all treatments received 100 μg GnRH analogue im with TAI at either 72 ± 3 h (14-d GnRH-9 treatment) or 63 ± 3 h (14-d GnRH-7 and 7-d CO-Synch treatments). Combined across all locations, pregnancy rates to TAI were not different (P > 0.05) between 14-d GnRH-9 (54.8%), 14-d GnRH-7 (54.4%), and 7-d CO-Synch (52.3%) treatments. In exp. two, 625 primiparous and multiparous lactating beef cows across 4 locations were randomly assigned to 1 of 3 treatments. Cows in the 14-d GnRH treatment (n = 205) received the same treatment as the 14-d 50 PG treatment described earlier. Cows in the 14-d PG treatment (n = 214) received the same treatment as 14-d GnRH cows except that 25 mg PG im was given on d 0 instead of GnRH analogue. Cows in the 5-day CO-Synch treatment (n = 206), received the same treatment as described previously. Cows in all treatments received 100 μg GnRH analogue im with…
Advisors/Committee Members: Peel, Kraig (advisor), Whittier, Jack (advisor), Seidel, George (committee member), Ahola, Jason (committee member).
Subjects/Keywords: beef cows; CIDR; dairy cows; estrus synchronization; reticulo-rumen temperature
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APA (6th Edition):
Giles, R. (2012). Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/68105
Chicago Manual of Style (16th Edition):
Giles, Ryan. “Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows.” 2012. Masters Thesis, Colorado State University. Accessed March 09, 2021.
http://hdl.handle.net/10217/68105.
MLA Handbook (7th Edition):
Giles, Ryan. “Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows.” 2012. Web. 09 Mar 2021.
Vancouver:
Giles R. Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows. [Internet] [Masters thesis]. Colorado State University; 2012. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10217/68105.
Council of Science Editors:
Giles R. Synchronizing follicular waves using 14 day CIDR insert protocols in beef cows and assessing reticulo-rumen temperature changes for detection of ovulation in dairy cows. [Masters Thesis]. Colorado State University; 2012. Available from: http://hdl.handle.net/10217/68105
6.
Gonzales, Ramona.
Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
.
Degree: 2012, California State University – San Marcos
URL: http://hdl.handle.net/10211.8/221
► Captive breeding programs and wildlife managers are challenged with maintaining bear populations, including the six (of eight) species that are endangered or threatened. Therefore, the…
(more)
▼ Captive breeding programs and wildlife managers are challenged with maintaining bear populations, including the six (of eight) species that are endangered or threatened. Therefore, the need for complete and thorough information on bear mating behavior is critical. While black bears are not endangered, they provide a model from which to learn valuable information that can be applied to other species.
The thesis presented herein contains the most comprehensive documentation on each stage of the consummatory phase of mating behavior in American black bears, Ursus americanus. In addition, it includes preliminary data on factors that potentially influence paternity in this species. Chapter 1 provides an overall introduction and the hypotheses. In chapter 2, we quantify each stage of the consummatory phase of mating behavior and provide evidence that male American black bears are using chemosensory signals to assess a female???s estrous state. Chapter 2 is a complete ???stand-alone??? document that will be submitted for publication. We present our preliminary paternity results in chapter 3 and discuss what these suggest about how black bears may be using male body size, induced ovulation and sperm competition as sexual selection strategies. In addition, we provide evidence that female American black bears are fertile in more than one of their multiple estruses.
We documented 139 mounts (14 successful and 125 unsuccessful). Successful mounts, those that included quivers (ejaculation), were significantly longer in duration (~30-fold) than unsuccessful mounts. We used two indicators of
estrus: physiological (average vulva score) and behavioral (bouts of successful mating). Physiological and behavioral
estrus overlapped in that all successful mounts occurred when females had an average vulva score of ???2. Our data suggest that males are using chemosensory cues to assess the estrous state of a female; 77% of successful mounts were preceded by anogenital investigation. Further, females may be using chemosensory cues to synchronize
estrus; only 1 in 5 females exhibited physiologic
estrus independently of the others.
Bears are assumed to employ sperm competition as a sexual selection strategy. One component of sperm competition is the relative amount of sperm deposited in the female???s reproductive tract. We compared intromission duration, intromission frequency, quiver duration and quiver frequency between sires and non-sires; there was no significant difference in these behavioral measures (p???0.55). However, one of our three females was mated by both sire (two times) and non-sire on the same day. Combining the sire???s 2 successful mounts resulted in a longer quiver duration (~1.5-fold), a higher quiver frequency (~1.5-fold), and most likely a higher proportion of sperm deposition. Therefore, this male may have employed sperm competition.
Female American black bears are polyestrus; however, it is unknown if each of these estruses is conceptive. One of our three females conceived in
estrus 1 yet still…
Advisors/Committee Members: Spady, Thomas J (advisor).
Subjects/Keywords: ursids; polyestrus; bears; mating; vulva score; estrus synchronization; anogenital investigation
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APA ·
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Manager
APA (6th Edition):
Gonzales, R. (2012). Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
. (Thesis). California State University – San Marcos. Retrieved from http://hdl.handle.net/10211.8/221
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gonzales, Ramona. “Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
.” 2012. Thesis, California State University – San Marcos. Accessed March 09, 2021.
http://hdl.handle.net/10211.8/221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gonzales, Ramona. “Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
.” 2012. Web. 09 Mar 2021.
Vancouver:
Gonzales R. Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
. [Internet] [Thesis]. California State University – San Marcos; 2012. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10211.8/221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gonzales R. Mating behavior and factors influencing paternity in a semi-free ranging population of American black bears, Ursus americanus
. [Thesis]. California State University – San Marcos; 2012. Available from: http://hdl.handle.net/10211.8/221
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Louisiana State University
7.
Lambe-Steinmiller, Jaclyn C.
The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer.
Degree: PhD, Animal Sciences, 2015, Louisiana State University
URL: etd-01092016-212103
;
https://digitalcommons.lsu.edu/gradschool_dissertations/3958
► Detection of estrus in white-tailed (WT) deer is laborious and often missed, as there are few visual cues presented during the 24 h period in…
(more)
▼ Detection of estrus in white-tailed (WT) deer is laborious and often missed, as there are few visual cues presented during the 24 h period in which females are receptive to mating. Reproductive management of WT operations is improved by the use of fixed-timed artificial insemination (FTAI) protocols. Fixed-timed AI removes the need for estrus detection and ensures the breeding of an entire herd, as well as the ability to schedule fawning within predetermined timeframes. Two studies evaluated two FTAI regimens and their ability to synchronize estrous in WT. The first study implemented the administration of eCG 200 IU (im) at progesterone device removal (CIDR-g), which had been present for 14 d, followed by FTAI 60 h post-CIDR-g removal. Finding from this study demonstrated that eCG given at CIDR removal did not affect pregnancy rates, nor did the fecundity rates of does pregnant to FTAI differ from does pregnant from natural mating. Does that were inseminated ¡Ý60.5 h after CIDR-g removal were 22 times more likely to become pregnant following FTAI than does which were inseminated ¡Ü60.5 h post-CIDR-g removal. The second study evaluated the effect of GnRH administered at insemination on pregnancy rates following a 14 d CIDR-g regimen. Similar to the previous study, does inseminated beyond 60.5 h post-CIDR-g withdrawal were four times more likely to become pregnant to FTAI. The odds of pregnancy also increased 5 times when does were treated with GnRH. However, the pregnancy rates from this study were lower than those when eCG was given at CIDR-g withdrawal. In addition to improving WT estrous synchronization, FTAI can lead to further improvements in WT in vitro production and propagation of desired genetics throughout a herd. The third study evaluated the chemical components of two in vitro fertilization media (BIVF and DSOF) and their ability to induce capacitation and the acrosome reaction in WT epididymal spermatozoa. Induction of lipid disorder was more likely when spermatozoa were in the presence of BIVF than DSOF. Additionally, when compared to supplementation of sheep serum, heparin in BIVF was more likely to improve capacitation rates. However, higher levels of calcium concentrations in DSOF were twice as likely to induce the acrosome reaction (AR).
Subjects/Keywords: IVF; epididymal spermatozoa; GnRH; eCG; estrus synchronization; deer
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APA (6th Edition):
Lambe-Steinmiller, J. C. (2015). The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-01092016-212103 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3958
Chicago Manual of Style (16th Edition):
Lambe-Steinmiller, Jaclyn C. “The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer.” 2015. Doctoral Dissertation, Louisiana State University. Accessed March 09, 2021.
etd-01092016-212103 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3958.
MLA Handbook (7th Edition):
Lambe-Steinmiller, Jaclyn C. “The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer.” 2015. Web. 09 Mar 2021.
Vancouver:
Lambe-Steinmiller JC. The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer. [Internet] [Doctoral dissertation]. Louisiana State University; 2015. [cited 2021 Mar 09].
Available from: etd-01092016-212103 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3958.
Council of Science Editors:
Lambe-Steinmiller JC. The Use of Assisted Reproductive Technologies to Improve Pregnancy Rates in White-tailed Deer. [Doctoral Dissertation]. Louisiana State University; 2015. Available from: etd-01092016-212103 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3958
8.
Gustavo Martins Gomes dos Santos.
Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva.
Degree: 2009, Universidade Estadual de Londrina
URL: http://www.bibliotecadigital.uel.br/document/?code=vtls000152485
► O objetivo deste trabalho foi avaliar o desempenho reprodutivo de ovelhas mestiças lanadas e deslanadas submetidas a um protocolo hormonal a base de progestágeno, durante…
(more)
▼ O objetivo deste trabalho foi avaliar o desempenho reprodutivo de ovelhas mestiças lanadas e deslanadas submetidas a um protocolo hormonal a base de progestágeno, durante a contraestação reprodutiva. No primeiro experimento, 48 ovelhas mestiças, sem raça definida, com escore de condição corporal médio 3,2 ± 0,5 e peso vivo médio 41 ± 2 kg foram divididas em dois tratamentos, levando em consideração apenas a presença (G-Lanadas, n=25) ou a ausência de lã (G-deslanadas, n=23). As ovelhas foram submetidas a tratamento hormonal de indução e ou sincronização de estro, que consistiu na colocação do dispositivo intravaginal contendo 60mg de acetato de medroxiprogesterona (MAP; Progespon®, Syntex, Argentina) em dia aleatório do ciclo estral (D0). No D7, foi administrado 300 UI de eCG (Novormon®, Syntex, Argentina) e 30ug de d-cloprostenol (Prolise®, Arsa S.R.L., Argentina), via intramuscular. No D9, o dispositivo foi retirado e após 12 horas os machos foram introduzidos no lote, em uma proporção de 1:6, nos dias 10, 11 e 12, e, posteriormente, por mais 45 dias. Os dados foram analisados pelo teste de Qui-Quadrado. As taxas de apresentação de estro foram 84% (G-Lanada) e 87% (G-Deslanada; p>0,05). As taxas de prenhez resultantes da sincronização foram 36,0% (G-Lanada) e 56,6% (G-Deslanada; p>0,05). As taxas de prenhez total, obtidas após o repasse com os reprodutores foram: 68,0% (G-Lanada) e 91,3% (G-Deslanada; p<0,05). Com estes resultados, concluímos que ovelhas mestiças deslanadas, sem raça definida, submetidas a protocolo hormonal a base de progestágeno, durante o período de contraestação, apresentaram desempenho reprodutivo superior ao de ovelhas mestiças lanadas. Com base nestes resultados, realizamos um segundo experimento com o objetivo de avaliar o desempenho reprodutivo de ovelhas mestiças lanadas e deslanadas, submetidas ou não a um protocolo hormonal a base de progestágeno durante o contraestação reprodutiva. Para este trabalho, utilizamos 48 ovelhas mestiças, sem raça definida, escore de condição corporal médio 2,8 ± 0,5 e peso vivo médio 41 ± 3 kg, que foram divididas em dois grupos, G-Control (n=24) sem tratamento hormonal e G-Sync (n=24) com tratamento hormonal, que consistiu na colocação do dispositivo intravaginal contendo 60mg de acetato de medroxiprogesterona (MAP; Progespon®, Syntex, Argentina) em dia aleatório do ciclo estral (D0). No D7, foi administrado 300 UI de eCG (Novormon®, Syntex, Argentina) e 30ug de cloprostenol (Prolise®, Arsa S.R.L., Argentina), via intramuscular. No D9, o dispositivo foi retirado e após 12 horas os machos foram introduzidos no lote, em uma proporção de 1:6, nos dias 10, 11 e 12, e, posteriormente, por mais 45 dias. Os dados foram analisados pelo teste de Qui-Quadrado. A taxa de manifestação do estro do grupo G-Sync foi de 87,5%. A taxa de prenhez resultante dos acasalamentos dos dias experimenais D10,11 e 12 foram de 0,00% (G-Control) e 45,83% (G-Sync; p<0,05). As taxas de prenhez total ao final do período de estação de monta foram de 50,00% (G-Control) e 79,17% (G-Sync;…
Advisors/Committee Members: Marcelo Marcondes Seneda ., Sony Dias Bicudo, Thales Ricardo Rigo Barreiros.
Subjects/Keywords: Ovino - Reprodução; Reprodução animal; Hormônios progestacionais - Ovino; Sheep; Reproduction; Progestational hormones; Sheep; Estrus; Synchronization; Estro - Sincronização; Estrus; Induction
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APA (6th Edition):
Santos, G. M. G. d. (2009). Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva. (Thesis). Universidade Estadual de Londrina. Retrieved from http://www.bibliotecadigital.uel.br/document/?code=vtls000152485
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Santos, Gustavo Martins Gomes dos. “Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva.” 2009. Thesis, Universidade Estadual de Londrina. Accessed March 09, 2021.
http://www.bibliotecadigital.uel.br/document/?code=vtls000152485.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Santos, Gustavo Martins Gomes dos. “Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva.” 2009. Web. 09 Mar 2021.
Vancouver:
Santos GMGd. Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva. [Internet] [Thesis]. Universidade Estadual de Londrina; 2009. [cited 2021 Mar 09].
Available from: http://www.bibliotecadigital.uel.br/document/?code=vtls000152485.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Santos GMGd. Efeito de um protocolo hormonal a base de progestágeno e eCG sobre o desempenho reprodutivo de ovelhas mestiças durante o período de contraestação reprodutiva. [Thesis]. Universidade Estadual de Londrina; 2009. Available from: http://www.bibliotecadigital.uel.br/document/?code=vtls000152485
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Daniel de Castro Burgos.
Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas.
Degree: 2012, Universidade Federal Rural de Pernambuco
URL: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1702
► O objetivo deste experimento foi comparar os resultados de prenhez da associação de Inseminação Artificial (IA) convencional com estro sincronizado acompanhado de IATF utilizando GnRH…
(more)
▼ O objetivo deste experimento foi comparar os resultados de prenhez da associação de Inseminação Artificial (IA) convencional com estro sincronizado acompanhado de IATF utilizando GnRH com os da IATF clássica em vacas azebuadas. Um total de 677 vacas foram sincronizadas com dispositivo de progesterona (P4) e 2 mg de benzoato de estradiol (BE) no D1, no D7 todas receberam 530 μg de PGF2α e no D9 foram retirados os implantes e todos os animais receberam 400 UI de eCG e foram avaliadas em três experimentos divididos da seguinte forma. No 1 experimento 190 vacas, conduzidas sem apartação temporária dos bezerros após a retirada dos dispositivos, foram divididas em três grupos: O grupo controle chamado de CE recebeu 0,4 mg de cipionato de estradiol (CE) e foram inseminadas na IATF 48 horas após a retirada dos dispositivos. O segundo e o terceiro grupos não receberam indutor de ovulação na retirada dos dispositivos e foram chamados de estro mais GnRH 48 horas e estro mais GnRH 54 horas. Essas vacas foram observadas para apresentação de estro por quatro vezes (12, 24, 36 e 48 horas) e as que apresentaram estro neste período foram inseminadas pelo método AM/PM com estro pela manhã inseminação a tarde e estro pela tarde com inseminação na manhã do dia seguinte; as vacas que não apresentaram estro neste período receberam 48 horas após a retirada dos dispositivos, aplicação de 25 μg de GnRH e foram inseminadas imediatamente no grupo estro mais GnRH 48 horas e após 6 horas da aplicação do GnRH foram inseminadas as vacas do lote estro mais GnRH 54 horas. No 2 experimento 242 vacas foram submetidas a protocolo semelhante, porém realizou-se o desmame temporário dos bezerros após a retirada dos implantes. No 3 experimento 245 vacas foram submetidas ao protocolo do experimento 2 porém utilizando dispositivos de P4 anteriormente utilizados. As vacas foram examinadas por ultrasonografia transretal de 5 MHz em 45 dias após as inseminações para detecção de prenhez nos experimentos 1 e 2 e 35 dias no experimento 3. No experimento 1 as vacas obtiveram as seguintes taxas de prenhez: grupo CE 58,18%; grupo estro mais GnRH 48 horas 56,21% e grupo estro mais GnRH 54 horas 61,97%. No experimento 2 os números de gestação foram: grupo CE 57,83%; grupo estro mais GnRH 48 horas 57,50% e grupo estro mais GnRH 54 horas 53,16%. No experimento 3 os números de gestação foram: grupo CE 57,14%; grupo estro mais GnRH 48 horas 56,10% e grupo estro mais GnRH 54 horas 54,43%. Não houve diferença significativa (p >0,05) entre os grupos. Apesar dos protocolos se mostrarem equivalentes nos resultados, o aumento do custo e da mão-de-obra dificultam sua utilização, sendo a IATF clássica mais simples e economicamente viável.
The objective of this experiment was to compare the results of the pregnancy obtained by the association of conventional Artificial Insemination (AI) with synchronized estrus together with GnRH in TAI with those of classical TAI in zebu cows. A total of 677 cows were synchronized with a progesterone vaginal device (P4) and 2 mg…
Advisors/Committee Members: Gustavo Férrer Carneiro.
Subjects/Keywords: Gado de corte; IATF; GnRH; Sincronização de estros; MEDICINA VETERINARIA; Estrus synchronization; TAI; Beef cattle
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APA (6th Edition):
Burgos, D. d. C. (2012). Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas. (Thesis). Universidade Federal Rural de Pernambuco. Retrieved from http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1702
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Burgos, Daniel de Castro. “Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas.” 2012. Thesis, Universidade Federal Rural de Pernambuco. Accessed March 09, 2021.
http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1702.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Burgos, Daniel de Castro. “Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas.” 2012. Web. 09 Mar 2021.
Vancouver:
Burgos DdC. Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas. [Internet] [Thesis]. Universidade Federal Rural de Pernambuco; 2012. [cited 2021 Mar 09].
Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1702.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Burgos DdC. Avaliação de sistemas de inseminação artificial com observação de estro ou em tempo fixo em vacas de corte azebuadas. [Thesis]. Universidade Federal Rural de Pernambuco; 2012. Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1702
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
10.
Utt, Matthew Douglas.
The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle.
Degree: MS, Animal and Poultry Sciences, 2002, Virginia Tech
URL: http://hdl.handle.net/10919/33769
► The objective of this experiment was to examine the effects of varying the interval from follicular wave emergence to progestin removal on follicular dynamics and…
(more)
▼ The objective of this experiment was to examine the effects of varying the interval from follicular wave emergence to progestin removal on follicular dynamics and the synchrony of
estrus. The experimental design was a 2x2x2 factorial with GnRH or estradiol-17 beta (E2) + progesterone (P4), controlled internal drug-releasing device (CIDR) treatment duration, and PG or saline treatment as main effects. Cycling, Angus cows (n=49), on d 6 to 8 of the estrous cycle, were randomly assigned to receive a CIDR treatment for 7 or 9 d. Approximately half of the cows from each CIDR group received either GnRH (100 mcg) or E2+P4 (1 mg E2 + 100 mg P4) at CIDR insertion. Cows in GnRH or E2+P4 groups were further divided into those that received PG (37.5 mg) or saline at CIDR insertion. All cows received PG (25 mg) 1 d prior to CIDR removal. The interval from follicular wave emergence to CIDR removal was longer for cows treated with GnRH (6.6 d) or a CIDR for 9 d (6.5 d) compared to those treated with E2+P4 (4.7 d) or a 7-d CIDR (4.8 d) (P < 0.05). Cows treated with PG or GnRH at CIDR insertion or a 9-d CIDR had a larger dominant follicle (DF) at CIDR removal than those treated with saline, E2+P4, or a 7-d CIDR. (P < 0.07). Altering the interval from wave emergence to progestin removal created differences in size of the DF at CIDR removal but did not affect the synchrony of
estrus.
Advisors/Committee Members: Beal, Wilfred E. (committeechair), Saacke, Richard G. (committee member), Estienne, Mark J. (committee member), Nebel, Raymond L. (committee member).
Subjects/Keywords: GnRH; estrus synchronization; estradiol; follicle; progestin
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APA (6th Edition):
Utt, M. D. (2002). The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/33769
Chicago Manual of Style (16th Edition):
Utt, Matthew Douglas. “The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle.” 2002. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/33769.
MLA Handbook (7th Edition):
Utt, Matthew Douglas. “The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle.” 2002. Web. 09 Mar 2021.
Vancouver:
Utt MD. The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle. [Internet] [Masters thesis]. Virginia Tech; 2002. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/33769.
Council of Science Editors:
Utt MD. The effects of varying the interval from follicular wave emergence to progestin withdrawal on follicular dynamics and the synchrony of estrus in beef cattle. [Masters Thesis]. Virginia Tech; 2002. Available from: http://hdl.handle.net/10919/33769
Virginia Tech
11.
Dorsey, Benjamin Reese.
Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers.
Degree: MS, Animal and Poultry Sciences, 2005, Virginia Tech
URL: http://hdl.handle.net/10919/42873
► Objectives were to evaluate time of insemination relative to estrus and synchronization with melengestrol acetate (MGA) plus prostaglandin (PG) or progesterone insert (CIDR) plus PG…
(more)
▼ Objectives were to evaluate time of insemination relative to
estrus and
synchronization with melengestrol acetate (MGA) plus prostaglandin (PG) or progesterone insert (CIDR) plus PG on AI pregnancy rate in beef heifers (n = 662) during Fall or Spring. Fall heifers (n = 349) received MGA-PG (MGA for 14 d followed by PG on d 18) or CIDR-PG (CIDR for 7 d, PG administered 1 d before CIDR removal).
Estrus was monitored by HeatWatch® (n = 200) or visually (n = 149). Spring heifers (n = 313) underwent CIDR-PG with detection of
estrus by HeatWatch®. Heifers not in
estrus by 96-100 h after PG were bred AI as non-responsive AI (NRAI). Across seasons, 548 heifers were bred following
estrus (EAI). Heifers synchronized during the Fall with MGA received more (P < 0.05) mounts than Fall CIDR heifers (76.8 ± 6.7 and 47.6 ± 7.4, respectively), but duration of
estrus was similar. Fall CIDR heifers had greater (P < 0.05) mounting activity and duration of
estrus (47.9 ± 5.2 mounts and 15.5 ± 1.1 h) compared to Spring CIDR heifers (34.5 ± 3.1 mounts and 12.7 ± 0.6 h). Heifers grouped in 4 h blocks from 0 to 24 h had no difference (P > 0.05) in pregnancy rates (mean 62.5 %). Treatment had no effect (P > 0.05) on EAI pregnancy rates. Pregnancy rates across seasons for EAI, NRAI and overall was 61.0 %, 26.3 %, and 54.5%. In conclusion, a 24 h window may exist to successfully AI heifers.
Advisors/Committee Members: Hall, John B. (committeechair), Nebel, Raymond L. (committee member), Whittier, William D. (committee member), Wahlberg, Mark L. (committee member).
Subjects/Keywords: Synchronization of Estrus; Heifers; CIDR; AI
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APA ·
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APA (6th Edition):
Dorsey, B. R. (2005). Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/42873
Chicago Manual of Style (16th Edition):
Dorsey, Benjamin Reese. “Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers.” 2005. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/42873.
MLA Handbook (7th Edition):
Dorsey, Benjamin Reese. “Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers.” 2005. Web. 09 Mar 2021.
Vancouver:
Dorsey BR. Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers. [Internet] [Masters thesis]. Virginia Tech; 2005. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/42873.
Council of Science Editors:
Dorsey BR. Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers. [Masters Thesis]. Virginia Tech; 2005. Available from: http://hdl.handle.net/10919/42873
12.
Marcello de Aguiar Rodrigues Cembranelli.
Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle.
Degree: 2005, Universidade Jose do Rosario Vellano
URL: http://tede.unifenas.br/tde_busca/arquivo.php?codArquivo=10
► A sincronização do estro em bovinos através da aplicação de agentes luteolíticos como prostaglandina F2 beta (PGF2 beta) ou seus análogos tem sido amplamente utilizadas…
(more)
▼ A sincronização do estro em bovinos através da aplicação de agentes luteolíticos como prostaglandina F2 beta (PGF2 beta) ou seus análogos tem sido amplamente utilizadas em programas reprodutivos e de transferência de embriões (TE)Os agentes luteolíticos causam lise do corpo lúteo resultando na manifestação de estro Consiste de um método prático e de menor custo quando comparado a outros métodos de sincronização e apresenta índices de fertilidade comparados ao natural desde que não haja interferências de fatores como condição corporal nutrição entre outros O objetivo deste trabalho foi o de verificar a eficiência da aplicação de diferentes doses (normal e reduzida) de um agente luteolítico via intramuscular em diferentes fases do ciclo estral (diestro) bem como o tempo de responsividade (intervalo aplicação-estro) O experimento foi realizado na fazenda Água Limpa no município de Fama-MG no período de novembro de 2004 a janeiro de 2005 Foram realizadas 288 aplicações de D-Cloprostenol sódico visando à sincronização de estro em novilhas mestiças utilizadas como receptoras num programa de transferência de embriões Os animais foram observados em estro natural classificados e distribuídos para o experimento de acordo com o dia do ciclo O grupo A correspondeu aos animais que estavam no dia da aplicação do 6 ao 8 dia do diestro considerando dia 0 como o estro O grupo B do 9 ao 11 dia do diestro O grupo C do 12 ao 14 dia do diestro e o grupo D as novilhas do 15 ao 17 dia do diestroTodos os grupos foram subdivididos em dois onde alguns animais receberam 75 miligramas (1ML) de D-cloprostenol sódico via intramuscular e o restante recebeu 150 miligramas (2ML) de D-cloprostenol sódico também intramuscular Para eficiência total a dose de 2ML apresentou melhor resposta (p<0,01) de 77,15% contra 50,55% da dose de 1ML Os grupos A (6 a 8) e B (9 a 11) apresentaram resultados próximos (p<0,05) da eficiência total sendo de 66,67% para 2ML e 36,36% para 1ML no grupo A e 78,43% e 56,67% respectivamente para o grupo B Portanto com melhor eficiência para o grupo que recebeu 2ML Os grupos C (12 a 14) e D (15 a 17) não mostraram diferença (p<0,05) na eficiência entre os grupos ou entre as doses com os seguintes resultados 73,58% (2ML) e 52,00% (1ML) para o grupo C e 73,58% e 52,00% respectivamente para o grupo D Para intervalo aplicação ao início do estro encontraram-se os seguintes resultados o grupo A apresentou intervalo médio de 58 horas diferindo significativamente (p<0,05) dos demais grupos que resultaram em 73,43 horas para o grupo B 79,06 para o grupo C e 75,23 para o grupo D O presente estudo mostrou que a utilização da dose de 1ML de D-cloprostenol sódico é semelhante à dose de 2ML a partir do decimo segundo dia do ciclo Portanto a utilização da subdose pode ser mais uma alternativa para se reduzir custos em um programa de TE desde que se conheça o momento da fase do ciclo estral das receptoras envolvidas no programa
The synchronization of estrus in bovines through the administration of luteolytic agents as prostaglandin F2 (PGF2)…
Advisors/Committee Members: Carlos Antônio de Carvalho Fernandes, Gustavo Augusto de Andrade, João Henrique Moreira Viana.
Subjects/Keywords: Sincronização; Bovino; D-Cloprostenol; FISIOPATOLOGIA DA REPRODUCAO ANIMAL; estrous cycle; bovine; Ciclo estral; estrus synchronization; D-cloprostenol
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APA ·
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APA (6th Edition):
Cembranelli, M. d. A. R. (2005). Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle. (Thesis). Universidade Jose do Rosario Vellano. Retrieved from http://tede.unifenas.br/tde_busca/arquivo.php?codArquivo=10
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cembranelli, Marcello de Aguiar Rodrigues. “Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle.” 2005. Thesis, Universidade Jose do Rosario Vellano. Accessed March 09, 2021.
http://tede.unifenas.br/tde_busca/arquivo.php?codArquivo=10.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cembranelli, Marcello de Aguiar Rodrigues. “Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle.” 2005. Web. 09 Mar 2021.
Vancouver:
Cembranelli MdAR. Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle. [Internet] [Thesis]. Universidade Jose do Rosario Vellano; 2005. [cited 2021 Mar 09].
Available from: http://tede.unifenas.br/tde_busca/arquivo.php?codArquivo=10.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cembranelli MdAR. Efficiency of two doses of D-cloprostenol for synchronization of estrus in bovines in the different phases of the estrous cycle. [Thesis]. Universidade Jose do Rosario Vellano; 2005. Available from: http://tede.unifenas.br/tde_busca/arquivo.php?codArquivo=10
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Biehl, Marcos Vinicius.
Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse.
Degree: Mestrado, Ciência Animal e Pastagens, 2009, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/11/11139/tde-04082009-091247/
;
► Na década de 60, começaram a ser utilizadas técnicas e sincronização do estro, e durante os últimos trinta anos tem sido despertado o interesse do…
(more)
▼ Na década de 60, começaram a ser utilizadas técnicas e sincronização do estro, e durante os últimos trinta anos tem sido despertado o interesse do desenvolvimento de métodos para sincronizar o estro de ovelhas. Na maioria das vezes a IA está associada à um protocolo de sincronização do estro podendo assim ser realizada a Inseminação Artificial em Tempo Fixo (IATF). Três experimentos foram realizados com objetivo de avaliar a influência do efeito macho e tipos de rufião, reutilização do dispositivo e o método de inseminação utilizado, na sincronização do estro através do uso de dispositivos intra-vaginais (CIDR®- Control Internal Drog Release), associado com a aplicação intramuscular de eCG e PGF2 , sobre a taxa detecção e tempo médio para aparecimento do estro, taxa de prenhez na IATF e no primeiro estro após a sincronização. Exp. I: Foram utilizadas 270 ovelhas, separadas em três tratamentos: SM = (controle) sem rufiões; DL= recebeu rufiões com Desvio lateral peniano e o VS= recebeu rufiões vasectomizados. Os tratamentos foram submetidos ao mesmo protocolo, CIDR® por 7d, aplicação de 300UI de eCG e 6,71 mg de Dinoprost trometamina, na retirada do CIDR. As ovelhas foram submetidas a IATF pelo método transcervical em 55h após a retirada do CIDR. EXP.II: Foram utilizadas 275 ovelhas, divididas em 4 tratamentos: 7N= 7d com CIDR novo; 7U= 7d com CIDR já usado por 7d; 11N= 11d com CIDR novo; 11U= 11d com CIDR já usado por 7d. No dia da retirada do CIDR (D7 ou D11) foi realizada a aplicação de 300 UI de eCG e 6,71 mg de Dinoprost trometamina. As ovelhas foram submetidas a IATF pelo método transcervical, 49h após a retirada do CIDR. Exp.III: Foram utilizadas 247 ovelhas, divididas em 4 tratamentos: MN= as ovelhas foram sincronizadas e submetidas a monta natural com carneiros; IATF = as ovelhas foram submetidas a IATF por laparoscopia 48h após a retirada do CIDR; IATF+GnRH= as ovelhas foram submetidas a IATF por laparoscopia + 0,05 mg de Gonadorelina, quando 50% das ovelhas apresentaram sinais de estro; IA= as ovelhas foram inseminadas por laparoscopia no sistema AM/PM, 12h após o início dos sinais de estro. Todos os tratamentos foram submetidos ao mesmo protocolo, CIDR por 11 dias, aplicação de 300UI de eCG e 6,31 mg de Dinoprost trometamina, na retirada do CIDR. Nos experimentos I e II as ovelhas foram submetidas ao repasse com carneiros por 20 dias. O delineamento utilizado foi de blocos incompletos ao acaso, analisados pelo teste do Qui-quadrado e Tukey (estro). A taxa de detecção de estro no tratamento IATF (exp. III) foi de 59,7% sendo menor que os demais tratamentos (P<0,05). A taxa de prenhez da sincronização do tratamento MN (61,1%), foi maior (P<0,05) que os tratamentos IATF e IATF+GnRH. A inseminação artificial transcervical apresentou resultados médios que variaram de 21 a 35% e não apresentaram diferença (P>0,05). O efeito macho e o tipo de macho não apresentaram diferença na IATF. O protocolo de 11 dias, mostrou-se eficiente em induzir o estro em 79% das ovelhas sincronizadas. A IA realizada 12h após o estro…
Advisors/Committee Members: Pires, Alexandre Vaz.
Subjects/Keywords: Ciclo estral animal; CIDR.; Estro animal; Estrus; Ewes; Ovelhas; Prenhez; Reprodução animal; Sincronização do cio.; Synchronization
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APA (6th Edition):
Biehl, M. V. (2009). Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/11/11139/tde-04082009-091247/ ;
Chicago Manual of Style (16th Edition):
Biehl, Marcos Vinicius. “Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse.” 2009. Masters Thesis, University of São Paulo. Accessed March 09, 2021.
http://www.teses.usp.br/teses/disponiveis/11/11139/tde-04082009-091247/ ;.
MLA Handbook (7th Edition):
Biehl, Marcos Vinicius. “Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse.” 2009. Web. 09 Mar 2021.
Vancouver:
Biehl MV. Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse. [Internet] [Masters thesis]. University of São Paulo; 2009. [cited 2021 Mar 09].
Available from: http://www.teses.usp.br/teses/disponiveis/11/11139/tde-04082009-091247/ ;.
Council of Science Editors:
Biehl MV. Uso de protocolos reprodutivos em ovelhas da raça Santa Inês sobre a sincronização e tempo médio para aparecimento do estro, a taxa de prenhez na IATF e no repasse. [Masters Thesis]. University of São Paulo; 2009. Available from: http://www.teses.usp.br/teses/disponiveis/11/11139/tde-04082009-091247/ ;
Universidade Federal de Viçosa
14.
Morgana Cardoso Brasileiro Borges.
Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto.
Degree: 2006, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=352
► O objetivo do estudo foi avaliar a influência do benzoato de estradiol, associado ao CIDR, na sincronização do estro e da ovulação sobre a taxa…
(more)
▼ O objetivo do estudo foi avaliar a influência do benzoato de estradiol, associado ao CIDR, na sincronização do estro e da ovulação sobre a taxa de sincronização e prenhez em vacas de corte zebuínas lactantes no pós-parto. Foram utilizadas 226 vacas zebuínas, previamente submetidas a avaliação para condição corporal, divididas aleatoriamente em três tratamentos: MN - monta natural (n=77) com estação de monta de 21 dias; T1 (n=70) as fêmeas receberam um dispositivo intra-vaginal de liberação de progesterona (CIDR) e uma injeção de benzoato de estradiol BE (dia zero do tratamento). No dia 7, foi removido o CIDR e aplicado uma dose única de PGF2α. As vacas foram inseminadas 12 horas após a observação do estro; T2 (n=79) as fêmeas foram submetidas ao mesmo protocolo empregado no T1, adicionando outra dose de BE no dia 8 e todas as fêmeas foram inseminadas 56 horas após a retirada do CIDR. As fêmeas dos tratamentos T1 e T2 manifestaram o estro na proporção de 96,7 e 100,0% respectivamente, sendo que a taxa de prenhez foi de: 42,9, 18,3 e 42,7% para os tratamentos MN, T1 e T2 respectivamente. A concentração plasmática média de progesterona no dia 0 foi de 11,71 ng/mL e de 8,87 ng/mL, no dia 7. Não foi observado influência do escore de condição corporal (ECC) sobre as taxas de prenhez das vacas estudadas neste experimento. No presente estudo, a utilização da dose suplementar de BE, 24 horas após a retirada do implante contendo progestágeno foi o protocolo mais indicado para vacas de corte lactantes no período pós-parto.
The objective of this research was to evaluate the effect of estradiol benzoate plus CIDR on estrus and ovulation synchronization and pregnancy rates in zebu lactating cows at postpartum. Two hundred and twenty six zebu cows, were randomly assigned to three different treatments: MN (n=77) - cows were submitted to a breeding season of 21 days, cows of the T1 (n=70) received an intravaginal progesterone device (CIDR) and an injection of estradiol benzoate (EB) (day 0 of treatment). On day 7, the CIDRs were removed and the animals received an injection of a PGF2α. The cows were inseminated 12 hours after estrus detection. Females of the T2 (n=79) received the same protocol as T1, but plus another injection of EB on day 8 and were inseminated at 56 hours after the CIDR implant removal. The estrus induction rates for the treatments T1 and T2 were 96.7 and 100.0% respectively. The pregnancy rates were respectively 42.9, 18.3 and 42.7% for the MN, T1 and T2 groups. The progesterone plasma concentration were 11.71 ng/mL (day 0) and 8.87 ng/mL (day 7). The body condition score (BCS) did not affect pregnancy rates. Estradiol benzoate injected 24 hours after progestágeno removal gave a better response for lactating beef cows at post-partum.
Advisors/Committee Members: Ciro Alexandre Alves Torres, Antonio Bento Mâncio, Mário Fonseca Paulino, Tarcízio Antônio Rego de Paula, José Domingos Guimarães.
Subjects/Keywords: Benzoato de estradiol; Sincronização do estro; Ovulação; Taxa de prenhez; Bovino; REPRODUCAO ANIMAL; Estradiol benzoate; Estrus synchronization; Ovulation; Pregnancy rates; Bovine
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APA ·
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APA (6th Edition):
Borges, M. C. B. (2006). Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Borges, Morgana Cardoso Brasileiro. “Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto.” 2006. Thesis, Universidade Federal de Viçosa. Accessed March 09, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Borges, Morgana Cardoso Brasileiro. “Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto.” 2006. Web. 09 Mar 2021.
Vancouver:
Borges MCB. Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto. [Internet] [Thesis]. Universidade Federal de Viçosa; 2006. [cited 2021 Mar 09].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Borges MCB. Efeito do estradiol associado ao progestágeno sobre a taxa de sincronização do estro, de ovulação e prenhez em vacas zebuínas lactantes no pós-parto. [Thesis]. Universidade Federal de Viçosa; 2006. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
15.
Pack, Julie Diane.
Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone.
Degree: MS, Physiology of Reproduction, 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2367
► Objectives were to determine: 1) whether estradiol benzoate (EB) provides a superior alternative to GnRH for synchronizing emergence, growth and maturation of a new follicular…
(more)
▼ Objectives were to determine: 1) whether estradiol benzoate (EB) provides a superior alternative to GnRH for synchronizing emergence, growth and maturation of a new follicular wave for fixed timed AI (TAI) in Bos indicus-influenced cattle using CIDR-based protocols, 2) the effect of 48 h calf removal at CIDR removal on the rate of maturational synchrony of the dominant follicle and 3) the effect of varying the magnitude of peak plasma progesterone (P4) concentrations following CIDR insertion on the suppression of FSH and LH secretion in a CIDR-based protocol using EB. In experiment 1, sixty-four Braford (F-1) females were stratified by BCS, parity and days postpartum and assigned randomly to one of four groups in a 2 x 2 factorial arrangement of treatments: 1) Select-Synch + CIDR, 2) Select-Synch + CIDR with 48 h calf removal, 3) E-Synch + CIDR or 4) E-Synch + CIDR with 48 h calf removal. A greater number of cattle in the EB treated group exhibited NFWE compared to the GnRH group, 29 vs 17 cows for EB and GnRH respectively, (P<0.0006). Intervals to NFWE were also greater in EB treated cattle than in GnRH treated cattle, 4.2 vs 2.7 d for EB and GnRH treated cattle respectively, (P<0.0001). Proportions of GnRH- and EB-treated cows ovulating after CIDR removal did not differ. Post-CIDR suckling status did not affect ovulation frequency or interval to ovulation. In experiment 2, eight pubertal (F-1) heifers were used in a Latin Square design with four treatment levels of P4: 1) EB only, 2) EB and new CIDR, 3) EB and new autoclaved CIDR, 4) EB, new autoclaved CIDR and P4 injection at CIDR insertion. Treatments 2 through 4 increased (P < 0.01) mean plasma P4 concentrations compared to treatment 1, with treatment 4 creating the greatest increase in P4 with the longest duration. Suppression of plasma FSH was greatest in group 4 (P<0.08), with mean 60 h concentrations less than in all other groups. Mean concentrations of LH were lesser in group 4 than groups 1 and 2. Frequencies of occurrence of NFWE and ovulation and intervals to NFWE did not differ among treatments. Results indicate that the use of EB and CIDR to synchronize Brahman x Hereford females may provide better
synchronization for TAI compared to GnRH and CIDR based protocols.
Advisors/Committee Members: Williams, Garry L. (advisor), Brinsko, Steven P. (committee member), Forrest, David W. (committee member).
Subjects/Keywords: estrus synchronization; Bos indicus; estradiol; progesterone; calf removal
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APA ·
Chicago ·
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CSE |
Export
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APA (6th Edition):
Pack, J. D. (2009). Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2367
Chicago Manual of Style (16th Edition):
Pack, Julie Diane. “Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone.” 2009. Masters Thesis, Texas A&M University. Accessed March 09, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2367.
MLA Handbook (7th Edition):
Pack, Julie Diane. “Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone.” 2009. Web. 09 Mar 2021.
Vancouver:
Pack JD. Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone. [Internet] [Masters thesis]. Texas A&M University; 2009. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2367.
Council of Science Editors:
Pack JD. Control of new follicular wave emergence and rate of follicular maturation in bos indicus-influenced cattle with estradiol benzoate, temporary calf removal and progesterone. [Masters Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2367
Texas A&M University
16.
Saldarriaga Lopez, Juan Pablo.
Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha).
Degree: MS, Physiology of Reproduction, 2007, Texas A&M University
URL: http://hdl.handle.net/1969.1/4733
► Objectives were to 1) evaluate the use of the CO-Synch + CIDR (COS-C) protocol for synchronization of ovulation and timed AI (TAI) in Bos indicus-influenced…
(more)
▼ Objectives were to 1) evaluate the use of the CO-Synch + CIDR (COS-C)
protocol for
synchronization of ovulation and timed AI (TAI) in Bos indicus-influenced
cattle, 2) compare cumulative pregnancy rates after COS-C
synchronization and TAI to
those in a traditional management (TM) scheme, and 3) evaluate specific ovarian,
hormonal, and estrual events associated with COS-C. The COS-C regimen included
insertion of a controlled internal drug release device (CIDR) containing progesterone
and injection of GnRH (GnRH-1) on day 0, removal of the CIDR and injection of
prostaglandin F2a
(PGF on d 7, and injection of GnRH (GnRH-2) and TAI 48 h later. In
experiment 1 (Exp. 1), 335 females were stratified by BCS, parity and d postpartum
before random assignment to COS-C or TM. An additional 96 females in which TM
controls were not available for comparison also received COS-C. Conception rates to
TAI averaged 39% (n = 266). Cumulative pregnancy rates were greater (P < 0.05) after
30 and 60 d of the breeding season in COS-C than in TM (n = 170 and 165 females respectively). In experiment 2 (Exp. 2), 100 postpartum (F1) females were stratified as
in Exp. 1 within four replicates (25 each) and assigned randomly to receive either COSC
or COS (no CIDR) treatment. No differences were observed between treatments and
all data were pooled. Percentages of cows ovulating after GnRH-1, developing a
synchronized follicular wave, exhibiting luteal regression to PGF, and ovulating to
GnRH-2 were 40, 60, 93, and 72%, respectively. In experiment 3 (Exp. 3), primiparous
(F1) heifers (n = 32) and pluriparous cows (n = 18) received the Select Synch + CIDR
synchronization regimen (no GnRH-2 or TAI). Mean intervals from CIDR removal to
estrus and ovulation, and from
estrus to ovulation were 70 ñ 2.9, 99 ñ 2.8, and 29 ñ 2.2
h, respectively. Relatively low TAI conception rates (< 50%) were attributed to failure
of 40% of cattle to develop a synchronized follicular wave after GnRH-1 and to
inappropriate timing of TAI/GnRH-2. It may be possible to improve TAI conception
rates by delaying TAI/GnRH-2 to between 66 and 72 h, and by developing methods to
increase the number of ovulations after GnRH-1.
Advisors/Committee Members: Williams, Gary L. (advisor), Brinsko, Steven P. (committee member), Welsh, Jr., Thomas H. (committee member).
Subjects/Keywords: Estrus synchronization; Artificial insemination; Beef cattle; Zebu
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APA ·
Chicago ·
MLA ·
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Export
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APA (6th Edition):
Saldarriaga Lopez, J. P. (2007). Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha). (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/4733
Chicago Manual of Style (16th Edition):
Saldarriaga Lopez, Juan Pablo. “Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha).” 2007. Masters Thesis, Texas A&M University. Accessed March 09, 2021.
http://hdl.handle.net/1969.1/4733.
MLA Handbook (7th Edition):
Saldarriaga Lopez, Juan Pablo. “Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha).” 2007. Web. 09 Mar 2021.
Vancouver:
Saldarriaga Lopez JP. Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha). [Internet] [Masters thesis]. Texas A&M University; 2007. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/1969.1/4733.
Council of Science Editors:
Saldarriaga Lopez JP. Ovarian and hormonal events during synchronization of ovulation and timed appointment breeding of Bos indicus-influenced cattle using intravaginal progesterone, GnRH and prostaglandin F2(alpha). [Masters Thesis]. Texas A&M University; 2007. Available from: http://hdl.handle.net/1969.1/4733
Montana State University
17.
Yamamoto, Satoshi.
Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations.
Degree: MS, College of Agriculture, 2002, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/8292
Subjects/Keywords: Beef cattle.; Estrus.; Synchronization.; Artificial insemination.; Break-even analysis.
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APA ·
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MLA ·
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APA (6th Edition):
Yamamoto, S. (2002). Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/8292
Chicago Manual of Style (16th Edition):
Yamamoto, Satoshi. “Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations.” 2002. Masters Thesis, Montana State University. Accessed March 09, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/8292.
MLA Handbook (7th Edition):
Yamamoto, Satoshi. “Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations.” 2002. Web. 09 Mar 2021.
Vancouver:
Yamamoto S. Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations. [Internet] [Masters thesis]. Montana State University; 2002. [cited 2021 Mar 09].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/8292.
Council of Science Editors:
Yamamoto S. Economic evaluation of estrous synchronization programs on Northern Range cow-calf operations. [Masters Thesis]. Montana State University; 2002. Available from: https://scholarworks.montana.edu/xmlui/handle/1/8292
Virginia Tech
18.
Jobst, Shelly Marie.
Evaluation of systematic breeding programs in lactating dairy cows.
Degree: MS, Dairy Science, 1998, Virginia Tech
URL: http://hdl.handle.net/10919/35439
► Observing cows in estrus and inseminating them at the optimal time are necessary steps for effective reproductive management of a dairy herd. However, increasing herd…
(more)
▼ Observing cows in
estrus and inseminating them at the optimal time are necessary steps for effective reproductive management of a dairy herd. However, increasing herd sizes can lead to reproductive inefficiency resulting in decreased profits on dairy herds.
Synchronization of
estrus, through pharmacological control, has been used to improve reproductive efficiency. Systematic breeding programs provide an organized approach for administering artificial insemination (AI) at first service. Moreover, reproductive management is based on a methodical approach for the entire herd rather than for the individual cow. Seven-hundred and thirty four Holstein cows from 16 commercial dairy herds were used to conduct this study evaluating three systematic breeding protocols; 14-d PGF2a, timed AI (TAI), and GnRH-PGF2α, in comparison with an untreated control group. Eight herds relied on visual observation as their primary method for detection of
estrus, and 8 herds utilized the HeatWatch® (DDx, Inc., Denver, CO) electronic
estrus detection system. The average days to first postpartum AI were longer for untreated control cows when compared to the other breeding protocols. First AI conception rates did not differ among control, 14-d PGF2a, or GnRH-PGF2a protocols, but were higher than the TAI protocol. However, first AI pregnancy rates were higher for untreated controls versus hormonally treated cows.
Estrus characteristics associated with each protocol were also evaluated and no difference was detected across treatments. An economic analysis determining cost per pregnancy for each protocol when considering drug costs, and pregnancy rates, resulted in the highest cost per pregnancy for TAI followed by GnRH-PGF2a and 14-d PGF2a. These programs should be considered as tools for convenience and efficiency of
estrus detection; however, reduced labor costs from less time spent on
estrus detection may be offset by the cost of the drug protocols. Cost effectiveness must be calculated on an individual herd basis when deciding whether a systematic breeding program is the appropriate choice.
Advisors/Committee Members: Nebel, Raymond L. (committeechair), Vinson, William E. (committee member), Pelzer, Kevin D. (committee member), McGilliard, Michael L. (committee member).
Subjects/Keywords: gonadotropin-releasing hormone; estrus synchronization; prostaglandin F2a
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APA (6th Edition):
Jobst, S. M. (1998). Evaluation of systematic breeding programs in lactating dairy cows. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/35439
Chicago Manual of Style (16th Edition):
Jobst, Shelly Marie. “Evaluation of systematic breeding programs in lactating dairy cows.” 1998. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/35439.
MLA Handbook (7th Edition):
Jobst, Shelly Marie. “Evaluation of systematic breeding programs in lactating dairy cows.” 1998. Web. 09 Mar 2021.
Vancouver:
Jobst SM. Evaluation of systematic breeding programs in lactating dairy cows. [Internet] [Masters thesis]. Virginia Tech; 1998. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/35439.
Council of Science Editors:
Jobst SM. Evaluation of systematic breeding programs in lactating dairy cows. [Masters Thesis]. Virginia Tech; 1998. Available from: http://hdl.handle.net/10919/35439
University of Florida
19.
Esterman, Regina.
Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols.
Degree: PhD, Animal Molecular and Cellular Biology, 2010, University of Florida
URL: https://ufdc.ufl.edu/UFE0042451
► Abstract of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of…
(more)
▼ Abstract of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy EVALUATION OF FOLLICLE DEVELOPMENT AND PREGNANCY RATES IN YEARLING HEIFERS AND LACTATING COWS OF BOS INDICUS times BOS TAURUS AND BOS TAURUS BREEDING THAT WERE SYNCHRONIZED WITH PROGESTOGEN-BASED PROTOCOLS By Regina Esterman December 2010 Chair: Joel V. Yelich Major: Animal Molecular and Cellular Biology A series of experiments were conducted to investigate follicular development and pregnancy rates following several progestogen-based estrous
synchronization programs in Bos indicus times Bos taurus and Bos taurus suckled cows and yearling heifers. In the first experiment, suckled Bos taurus (Angus) and Bos indicus times Bos taurus (Brangus) cows were synchronized with a 7-11 protocol involving a 7 d melengestrol acetate (MGA) treatment, followed by prostaglandin F2_? (PGF) on d 7, gonadotropin releasing hormone (GnRH) on d 11, and a second PGF treatment on d 18. Breed differences were observed in luteal regression and interval from PG2 to the onset of
estrus, but overall estrous response and pregnancy rates were similar between Angus and Brangus cows. In the second experiment, anestrous and estrous cycling Angus and Brangus cows were synchronized with GnRH and a progesterone insert (CIDR) on d 0, followed by CIDR removal and PGF on d 7 (7 d CIDR). Following PGF
estrus was detected and cows were artificially inseminated (AI) 8 to 12 h after
estrus and cows not exhibiting
estrus were timed-AI at 73 to 80 h. Follicle development was tracked through the
synchronization treatment by ultrasound exams. Anestrous cows were evaluated based on whether they ovulated or did not ovulate to GnRH on d 0 and estrous cycling cows were presynchronized to be on days 2, 6, 10, 14, or 18 of their estrous cycle at the start of
synchronization. In both anestrous and estrous cycling cows, differences in follicle numbers and
estrus characteristics were observed for Angus and Brangus, but overall pregnancy rates were similar between the breeds. Day of the estrous cycle that the
synchronization was initiated influenced ovulation rate to GnRH, ovulatory follicle sizes, follicle growth rates, and overall pregnancy rates, indicating stage of follicle developments influence on the effectiveness of the
synchronization protocol. In the third experiment, a field trial was conducted in suckled Bos indicus times Bos taurus cows comparing a 7 d CIDR protocol to a modified protocol with GnRH and CIDR insertion on d 0, followed by CIDR removal and PGF on d 7.5 with a fixed-time AI at 60 to 66 h. Pregnancy rates were similar for the two protocols, providing a less labor intensive option with the fixed-time-AI protocol to achieve similar pregnancy rates in Bos indicus times Bos taurus cows. In the final experiment Bos indicus times Bos taurus heifers were synchronized with one of three treatments: a 7 d CIDR as described in the second experiment, a 5 d CIDR, or a modified 7 d CIDR protocol…
Advisors/Committee Members: Yelich, Joel V. (committee chair), Ealy, Alan (committee member), Thatcher, William W. (committee member), Lamb, Graham (committee member), Rae, Darrell O. (committee member).
Subjects/Keywords: Breeding; Breeding seasons; Cattle; Conception rate; Estrus; Estrus cycle; Heifers; Ovulation; Pregnancy rate; Zebu; cattle, cidr, estrus, follicle, indicus, progestogen, synchronization
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APA (6th Edition):
Esterman, R. (2010). Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0042451
Chicago Manual of Style (16th Edition):
Esterman, Regina. “Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols.” 2010. Doctoral Dissertation, University of Florida. Accessed March 09, 2021.
https://ufdc.ufl.edu/UFE0042451.
MLA Handbook (7th Edition):
Esterman, Regina. “Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols.” 2010. Web. 09 Mar 2021.
Vancouver:
Esterman R. Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols. [Internet] [Doctoral dissertation]. University of Florida; 2010. [cited 2021 Mar 09].
Available from: https://ufdc.ufl.edu/UFE0042451.
Council of Science Editors:
Esterman R. Evaluation of Follicle Development and Pregnancy Rates in Yearling Heifers and Lactating Cows of Bos Indicus X Bos Taurus and Bos Taurus Breeding That Were Synchronized with Progestogen-Based Protocols. [Doctoral Dissertation]. University of Florida; 2010. Available from: https://ufdc.ufl.edu/UFE0042451
Technical University of Lisbon
20.
Palmeiro, António João Minhós.
Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso.
Degree: 2013, Technical University of Lisbon
URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/5488
► Dissertação de Mestrado Integrado em Medicina Veterinária
A situação económica mundial criou nos produtores de bovinos de carne em regime extensivo a necessidade de utilizarem…
(more)
▼ Dissertação de Mestrado Integrado em Medicina Veterinária
A situação económica mundial criou nos produtores de bovinos de carne em regime
extensivo a necessidade de utilizarem práticas de maneio eficientes para se aumentar a
rentabilidade dos seus sistemas de produção.
A eficiência reprodutiva afeta de forma considerável o resultado económico de uma
exploração produtora de bovinos de carne em regime extensivo, Assim, surge a
necessidade de identificar as causas responsáveis por uma baixa eficiência e possíveis
medidas corretivas do maneio reprodutivo.
A exploração em estudo, apresentou em anos anteriores, taxas de fertilidade abaixo do
desejável e intervalo entre partos longos, tendo o produtor demonstrado junto do médico
veterinário a vontade de melhorar estes indicadores no sentido de aumentar a eficiência
produtiva da sua exploração.
Neste âmbito, o estudo consistiu na aplicação de um protocolo de sincronização de estro no
final da época reprodutiva após diagnóstico de gestação. Analisou-se a variação do intervalo
entre partos e da taxa de gestação, bem como a forma como a alteração da época
reprodutiva influencia a eficiência reprodutiva da vacada. O estudo possibilitou ainda a
identificação das causas dos problemas reprodutivos e a sugestão de possíveis soluções.
O protocolo foi aplicado a 24 fêmeas das quais 15 ficaram gestantes. A taxa de gestação do
grupo sincronizado foi de 62%. A aplicação deste protocolo significou um aumento de 13%
na taxa de gestação da amostra (122 fêmeas) de 53% para 66%. A média dos intervalos
entre partos previsionais foi de 449 dias, havendo uma redução de 46 dias do último
intervalo entre partos da amostra.
Pode concluir-se deste modo que o controlo técnico reprodutivo pode efetivamente melhorar
a performance reprodutiva dos efetivos, aumentando a sua eficiência e consequentemente a
rentabilidade económica da exploração.
ABSTRACT -
Optimizing reproductive efficiency in extensively kept beef cattle in Alentejo – Case Study -
Given the global economic situation extensively kept beef cattle producers, are increasingly
required to use effective management practices in order to increase the profitability of their
production systems.
Reproductive efficiency is directly related to the economic performance of beef cattle farms,
so it is crucial to identify the causes for a low efficiency, and so seek potential corrective
measures through reproductive management.
The beef cattle farm in this study presented in previous years fertility rates below the
desirable and long calving intervals. In this context the producer showed the veterinarian the
desire to improve these indicators in order to increase the production efficiency of his farm.
Thus, the present study includes the application of a synchronization protocol of estrus at the
end of the reproductive season after pregnancy diagnosis. We analyzed the variation in
calving intervals and the variation in the rate of pregnancy, as well as how the change in the
reproductive season influenced reproductive efficiency of the farm. The…
Advisors/Committee Members: Martelo, Rui Jorge Batista, Stilwell, George Thomas.
Subjects/Keywords: Bovinos; extensivo; maneio reprodutivo; diagnóstico de gestação; sincronização de estro; intervalos entre partos; taxa de gestação; cattle; extensive; reproductive management; pregnancy diagnosis; estrus synchronization; calving interval; pregnancy rate
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APA ·
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CSE |
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APA (6th Edition):
Palmeiro, A. J. M. (2013). Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/5488
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Palmeiro, António João Minhós. “Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso.” 2013. Thesis, Technical University of Lisbon. Accessed March 09, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/5488.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Palmeiro, António João Minhós. “Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso.” 2013. Web. 09 Mar 2021.
Vancouver:
Palmeiro AJM. Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso. [Internet] [Thesis]. Technical University of Lisbon; 2013. [cited 2021 Mar 09].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/5488.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Palmeiro AJM. Otimização da eficiência reprodutiva numa vacada no Alentejo : estudo de caso. [Thesis]. Technical University of Lisbon; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/5488
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
AntÃnio Nelson Lima da Costa.
SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch.
Degree: Master, 2006, Universidade Federal do Ceará
URL: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1385
;
► Avaliou-se a eficiÃncia de dois protocolos de induÃÃo e sincronizaÃÃo do estro e da ovulaÃÃo (âCIDR-Bâ âOVSYNCHâ) em 90 novilhas acÃclicas da raÃa Girolanda. Os…
(more)
▼ Avaliou-se a eficiÃncia de dois protocolos de induÃÃo e sincronizaÃÃo do estro e da ovulaÃÃo (âCIDR-Bâ âOVSYNCHâ) em 90 novilhas acÃclicas da raÃa Girolanda. Os animais foram distribuÃdos em trÃs grupos, onde o primeiro (n=30) foi
submetido ao protocolo âOVSYNCHâ, que consiste na aplicaÃÃo intramuscular (IM) de 1,0ml de GnRH, sete dias depois 2,0ml de prostaglandina F2a (PGF2a), 48h depois
mais 1,0ml de GnRH e IATF 16h apÃs a segunda dose de GnRH. O segundo grupo (n=30) foi submetido ao tocolo âCIDR-Bâ, que consiste na introduÃÃo do implante intravaginal âCIDR-Bâ juntamente com a aplicaÃÃo IM de 2,0ml de benzoato de
estradiol (BE), apÃs 8 dias à feita a remoÃÃo do âCIDR-Bâ e a aplicaÃÃo IM de 500UI de gonadotrofina sÃrica da Ãgua prenhe (PMSG) e 2,0ml de PGF2a, 24h apÃs à feita
mais uma aplicaÃÃo IM de BE e IATF 30h depois desta aplicaÃÃo, ou seja, 54h apÃs a remoÃÃo do âCIDR-Bâ. O rceiro grupo (n=30), grupo controle, nÃo foi submetido a
tratamento hormonal. Os diagnÃsticos de gestaÃÃes foram feitos 35 dias apÃs a primeira, segunda e terceira nseminaÃÃes artificiais (IA) por meio de ultra-sonografia
(US). TambÃm foi avaliado o custo/benefÃcio de cada protocolo. O tratamento âCIDRBâ mostrou-se mais eficiente em primeira IA (p<0,05), assemelhando-se ao grupo
controle com taxas de concepÃÃo e prenhez de 60 e 50%, respectivamente, demonstrando ter uma qualidade de estro comparÃvel ao natural. Na segunda IA, os tratamentos foram equivalentes nas taxas de prenhez, mas diferiram nas de concepÃÃo (96% âCIDR-Bâ e 76% âOVSYNCHâ). Deste modo, o protocolo âCIDR-Bâ mostrouse mais eficiente na induÃÃo da puberdade em novilhas girolandas com melhores taxas
de concepÃÃo e prenhez em primeira IA, reduzindo onsideravelmente a idade ao primeiro parto. AlÃm disso, apresenta-se economicamente viÃvel com possibilidade de
reutilizaÃÃo do implante, devendo-se atentar aos cuidados com higiene e manipulaÃÃo do produto.
Two oestrus and ovulation synchronization protocols (CIDR-B and OVSYNCH) were tested on 90 acyclical Girolanda heifers. The animals were distributed in three groups. Group I (n=30) was submitted to the OVSYNCH protocol,
consisting of: intramuscular (IM) application of 1.0 ml gonadotropin-releasing hormone (GnRH), 2.0 ml rostaglandin F2a (PGF2a) after 7 days, 1.0ml GnRH 48h later, then
timed artificial insemination (TAI) 16h after the second application of GnRH. Group II (n=30) was submitted to the CIDR-B protocol, consisting of: introduction of intravaginal CIDR-B implant and application of 2.0 ml estradiol benzoate (EB) IM, implant removal after 8 days, application of 500 UI pregnant mare serum gonadotropin
(PMSG) and 2.0 ml PGF2a, a second IM application of BE 24h subsequently, then TAI 30h later (i.e. 54h following implant removal). Group III (n=30; control group) received
no hormonal treatment. Gestation was verified ltrasonographically 35 days after the first, second and third AI. The cost-benefit ratio of each protocol was also determined: The CIDR-B protocol was most efficient in the first AI in which it was…
Advisors/Committee Members: Ana ClÃudia Nascimento Campos, Davide Rondina, Airton Alencar de AraÃjo.
Subjects/Keywords: ZOOTECNIA; sincronizaÃÃo do estro, ovulaÃÃo, inseminaÃÃes; synchronization of estrus, ovulation, inseminations
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APA ·
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Manager
APA (6th Edition):
Costa, A. N. L. d. (2006). SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch. (Masters Thesis). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1385 ;
Chicago Manual of Style (16th Edition):
Costa, AntÃnio Nelson Lima da. “SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch.” 2006. Masters Thesis, Universidade Federal do Ceará. Accessed March 09, 2021.
http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1385 ;.
MLA Handbook (7th Edition):
Costa, AntÃnio Nelson Lima da. “SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch.” 2006. Web. 09 Mar 2021.
Vancouver:
Costa ANLd. SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch. [Internet] [Masters thesis]. Universidade Federal do Ceará 2006. [cited 2021 Mar 09].
Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1385 ;.
Council of Science Editors:
Costa ANLd. SincronizaÃÃo do estro e da ovulaÃÃo em novilhas girolandas: comparaÃÃo entre os protocolos hormonais âcidr-bâ e âovsynch. [Masters Thesis]. Universidade Federal do Ceará 2006. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1385 ;
University of Georgia
22.
McLean, Amy Katherine.
Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/21336
► In Experiment 1, 164 heifers were assigned to two treatment groups. Each received a CIDR insert for 7 days. Treatment 1 received prostaglandin (PGF2 á…
(more)
▼ In Experiment 1, 164 heifers were assigned to two treatment groups. Each received a CIDR insert for 7 days. Treatment 1 received prostaglandin (PGF2 á ), 5 mg; i.m., on day 6 and Treatment 2 received PGF2 á on day 7. 86.6% of the heifers
(142 of 164) exhibited signs of estrus and were inseminated. 47% of the 142 inseminated were pregnant (33 in Treatment 1 and 34 in 2). In Experiment 2, 71 heifers were assigned to three treatment groups and received a CIDR insert for 7 days and PGF2 á on
day 7. Treatment 1 received a CIDR and PGF2 á . Treatment 2 were injected with ECP, 0.5 mg; i.m., on day 8. Treatment 3 animals were injected with GnRH, 2 mg; i.m., on day 9. All heifers were bred by TAI on Day 10. 50.7 % of the 69 heifers were pregnant
(13 in Treatment 1, 10 in 2, and 12 in 3).
Subjects/Keywords: Controlled Internal Drug Release (CIDR); Dairy heifer; Estrus synchronization; Progestin; Estradiol cypionate (ECP); Gonadotropin releasing hormone (GnRH); Prostaglandin (PGF2á); and Timed artificial insemination (TAI)
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APA (6th Edition):
McLean, A. K. (2014). Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/21336
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
McLean, Amy Katherine. “Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers.” 2014. Thesis, University of Georgia. Accessed March 09, 2021.
http://hdl.handle.net/10724/21336.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McLean, Amy Katherine. “Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers.” 2014. Web. 09 Mar 2021.
Vancouver:
McLean AK. Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10724/21336.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McLean AK. Using controlled internal drug release (CIDR) inserts for estrus synchronization in dairy heifers. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/21336
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Wege Dias, Nicholas.
Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols.
Degree: MS, Animal and Poultry Sciences, 2018, Virginia Tech
URL: http://hdl.handle.net/10919/86484
► Infertility is a major issue that affects profitability of beef cow-calf producers. Estrous synchronization (ES) protocols are a tool that allow artificial insemination (AI) without…
(more)
▼ Infertility is a major issue that affects profitability of beef cow-calf producers. Estrous
synchronization (ES) protocols are a tool that allow artificial insemination (AI) without
estrus detection and increases the proportion of females pregnant at the start of the breeding season, providing a strategy to improve profitability. However, females enrolled in the ES protocol and that fail to express
estrus have reduced pregnancy rates when compared to females expressing
estrus. Furthermore, beef females with excitable temperament have reduced fertility when compared to females with adequate temperament. The effects of delaying insemination to 8 hours post injection of gonadotropin-releasing hormone for animals failing to express
estrus during ES were determined in beef multiparous cows. Cows expressing
estrus had greater pregnancy rates compared to cows not expressing
estrus, and delayed insemination did not improve pregnancy rates. To determine the effects of temperament on fertility heifers were enrolled in an ES protocol and had temperament determined as adequate or excitable based on chute score and exit velocity. Hair and blood samples were collected for cortisol evaluation. Excitable heifers had reduced pregnancy rates and greater circulating cortisol concentrations, but hair cortisol did not differ between temperaments. Overall cortisol profiles indicate that heifers became acclimated to handling during ES protocol. Development of ES that maximizes
estrus expression prior to AI and selection of cattle with adequated temperament can enhance profitability of cow-calf operations.
Advisors/Committee Members: Mercadante, Vitor Rodriques Gomes (committeechair), Ealy, Alan D. (committee member), Rhoads, Michelle (committee member).
Subjects/Keywords: beef; cattle; fertility; estrous synchronization; estrus expression; temperament; acclimation
…synchronization protocol and that were not
detected in estrus by the time of fixed-time AI.
Abstract
We… …estrus synchronization protocol that were not detected in estrus by
the time of fixed-time AI… …CIDR estrus synchronization protocol. Briefly, 100 μg
injection of GnRH and CIDR insertion… …estrus
synchronization protocol that are detected in estrus prior to the time of AI have… …estrus expression to the protocol (Bishop et al., 2016) ovulation response
to the…
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APA ·
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APA (6th Edition):
Wege Dias, N. (2018). Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/86484
Chicago Manual of Style (16th Edition):
Wege Dias, Nicholas. “Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols.” 2018. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/86484.
MLA Handbook (7th Edition):
Wege Dias, Nicholas. “Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols.” 2018. Web. 09 Mar 2021.
Vancouver:
Wege Dias N. Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols. [Internet] [Masters thesis]. Virginia Tech; 2018. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/86484.
Council of Science Editors:
Wege Dias N. Strategies to improve fertility of Bos taurus beef females enrolled in estrous synchronization protocols. [Masters Thesis]. Virginia Tech; 2018. Available from: http://hdl.handle.net/10919/86484
24.
Petrone, Rosalie Catherine.
Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems.
Degree: MS, Animal and Poultry Sciences, 2015, Virginia Tech
URL: http://hdl.handle.net/10919/54594
► The U.S. hog industry's shift to vertically-integrated, intensively-managed operations brought about a variety of management systems for breeding herds, including batch farrowing. In this system,…
(more)
▼ The U.S. hog industry's shift to vertically-integrated, intensively-managed operations brought about a variety of management systems for breeding herds, including batch farrowing. In this system, groups of sows are weaned in 2- to 5- week intervals, making
estrus synchronization of new gilts and sows critical to maintaining reproductive efficiency in the herd. The use of commercially available hormones to synchronize
estrus in this system has not been extensively studied. This experiment was conducted to determine whether the use of commercially available hormones (MATRIX® and P.G. 600®; Merck Animal Health, De Sota, KS) in a 5-week batch management system had a positive impact on reproductive efficiency in gilts and sows over the course of 3 parities. Gilts were allocated to an Entry Group (A, B, or D) and then assigned to a treatment, Hormone-Assisted (HA) (5 mL P.G. 600 injection 5 days and/or fed 15 mg/day of MATRIX for 14 consecutive days prior to the breeding week) or Control (no exogenous hormones). Gilts and sows were checked daily for
estrus with a mature boar, and a group was bred using AI during a 7-day breeding period every 5 weeks and allowed to farrow up to 3 parities. Among groups, there was a tendency (P = 0.08) for more HA than control gilts to display
estrus and be mated on schedule. For gilts within Group A, more (P < 0.01) HA than control females displayed
estrus and were mated. Body weight at first service for gilts in Groups A and B were higher than Group D (P < 0.01). Overall, there was no effect of treatment on (P = 0.20) non-productive days. There was a strong tendency for HA sows to have a greater (P = 0.07) number of parities completed than control sows; Total pigs born (P < 0.05) and total pigs born alive (P < 0.05) were greater for HA sows than control sows. In Parity 1, Group D sows had a lesser number of pigs born (P < 0.01) and pigs born alive (P < 0.02) than Groups A and B; The number of pigs weaned differed between entry groups (P < 0.05) (Group B > Group A > Group D); Control sows weaned more pigs (P < 0.02) and had a greater litter weaning weight (P < 0.01) than HA sows; HA sows had a lower (P < 0.05) wean-to-
estrus interval than control sows. No significant effects of group or treatment were observed in Parities 2 and 3. The use of exogenous hormones to synchronize
estrus had a positive impact on reproductive efficiency in HA gilts/sows in a 5-week batch management system.
Advisors/Committee Members: Estienne, Mark J. (committeechair), Wood, Cynthia M. (committee member), Ealy, Alan D. (committee member).
Subjects/Keywords: batch farrowing; estrus synchronization; Matrix; P.G. 600; pig
…x28;Wood et al., 1992). Many estrus synchronization
protocols have been developed over… …groups and proportion of gilts displaying estrus and mated
during the specific breeding period… …weaned
Wean-to-estrus interval
Wean-to-service interval
xi
Introduction
Advances in… …which help synchronize
estrus in breeding females. One is MATRIX® (Merck Animal Health… …that gilts and sows fed MATRIX for 14
days will display estrus 4 to 9 days after removing it…
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APA (6th Edition):
Petrone, R. C. (2015). Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/54594
Chicago Manual of Style (16th Edition):
Petrone, Rosalie Catherine. “Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems.” 2015. Masters Thesis, Virginia Tech. Accessed March 09, 2021.
http://hdl.handle.net/10919/54594.
MLA Handbook (7th Edition):
Petrone, Rosalie Catherine. “Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems.” 2015. Web. 09 Mar 2021.
Vancouver:
Petrone RC. Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems. [Internet] [Masters thesis]. Virginia Tech; 2015. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/10919/54594.
Council of Science Editors:
Petrone RC. Using Commercially Available Hormones to Enhance Swine Reproductive Efficiency in Batch Management Systems. [Masters Thesis]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/54594
Kansas State University
25.
Buttrey, Brad Sterling.
Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle.
Degree: MS, Department of Animal Sciences and
Industry, 2008, Kansas State University
URL: http://hdl.handle.net/2097/542
► A study was performed to determine the minimum effective dose of human chorionic gonadotropin (hCG) needed to induce ovulation of follicles in cattle (Exp. 1).…
(more)
▼ A study was performed to determine the minimum effective
dose of human chorionic gonadotropin (hCG) needed to induce
ovulation of follicles in cattle (Exp. 1). Another study determined
the effects of replacing the first injection of GnRH (d -7) with
hCG or saline in a Resynch-Ovsynch protocol [injection of GnRH 7 d
before and 48 h after PGF[subscript2alpha] before a resynchronized
fixed-timed AI (TAI)] on pregnancy rates in cows diagnosed not
pregnant and pregnancy survival in cows diagnosed pregnant (d 0;
Exp. 2). A final study determined the ovulation potential of hCG
compared with GnRH and saline (Exp. 3). In Exp. 1, ovaries of
Holstein cows were mapped by using transrectal ultrasonography 7 d
before pregnancy diagnosis. Cows were assigned to treatments of
saline, 100 [Mu]g of GnRH, or 500, 1,000, 2,000, or 3,000 IU of
hCG. Ovarian structures were monitored 7 d later and proportion of
cows and follicles that ovulated were recorded. In Exp. 2, cows in
4 herds were assigned to treatments of 1,000 IU of hCG, 100 [Mu]g
of GnRH, or left as untreated controls 7 d before pregnancy
diagnosis. Nonpregnant cows were given PGF[subscript2alpha] (d 0),
then inseminated 72 h later, concurrent with a GnRH injection.
Pregnancy rates tended (P = 0.08) to be increased by GnRH (17.9%; n
= 703) compared with control (12.9%; n = 505), but not hCG (16.5%;
n = 541). Incidences of ovulation in nonpregnant cows (Exp. 3)
were: hCG (51.6%; n = 126), GnRH (46.1%; n = 102), and control
(28.1%; n = 96), whereas those in pregnant cows were: hCG (59.3%; n
= 59), GnRH (24.5%; n = 49), and control (6.9%; n = 58). We
concluded that: 1) a minimum dose of 1,000 IU of hCG resulted in a
greater ovulatory response than saline, GnRH, or 500 IU of hCG
(Exp. 1); 2) initiating a Resynch-Ovsynch protocol 7 d before
pregnancy diagnosis with saline reduced timed AI pregnancy rates
(Exp. 2); and 3) incidence of new CL was greater after hCG than
GnRH in pregnant cows, but not in nonpregnant cows (Exp.
3).
Advisors/Committee Members: Jeffrey S. Stevenson.
Subjects/Keywords: hCG;
GnRH; Ovulation
synchronization; Estrus
synchronization; Agriculture, Animal Culture and Nutrition
(0475); Agriculture, General (0473)
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Buttrey, B. S. (2008). Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/542
Chicago Manual of Style (16th Edition):
Buttrey, Brad Sterling. “Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle.” 2008. Masters Thesis, Kansas State University. Accessed March 09, 2021.
http://hdl.handle.net/2097/542.
MLA Handbook (7th Edition):
Buttrey, Brad Sterling. “Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle.” 2008. Web. 09 Mar 2021.
Vancouver:
Buttrey BS. Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle. [Internet] [Masters thesis]. Kansas State University; 2008. [cited 2021 Mar 09].
Available from: http://hdl.handle.net/2097/542.
Council of Science Editors:
Buttrey BS. Human chorionic
gonadotropin and gonadotropin-releasing hormone influence pregnancy
survival and resynchronized ovulation before timed artificial
insemination in Holstein cattle. [Masters Thesis]. Kansas State University; 2008. Available from: http://hdl.handle.net/2097/542
26.
Gama, Rogério Dantas.
Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs.
Degree: Mestrado, Reprodução Animal, 2003, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-14062004-104644/
;
► A pesquisa desenvolvida no Laboratório de Pesquisa em Suínos, da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Campus de Pirassununga, estudou…
(more)
▼ A pesquisa desenvolvida no Laboratório de Pesquisa em Suínos, da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Campus de Pirassununga, estudou os efeitos de diferentes doses de LH suíno exógeno na indução e sincronização da puberdade em marrãs. Sessenta e sete fêmeas Camborough - 22 Agroceres PIC® com 140 dias de idade e 86 kg de peso vivo foram submetidas aos seguintes tratamentos: controle T1 (n = 21) - emprego de 600 UI de eCG (gonadotrofina coriônica eqüina) (Novormon®) e 72 horas depois 5,0 mg de LH (hormônio luteinizante) (Lutropin® - V); tratamento 2 T2(n = 23) - 600 UI de eCG (Novormon®) e, 72 horas depois, 2,5 mg de LH (Lutropin® - V) e tratamento 3 T3(n=23) - 600 UI de eCG (Novormon®) e, 72 horas depois, 1,25 mg de LH (Lutropin® - V). O estímulo com macho adulto era feito duas vezes ao dia, sendo a ovulação detectada pela ultra-sonografia transcutânea e a taxa de ovulação, pela contagem do número de corpos lúteos (CL) ao abate. O percentual de estro foi semelhante entre T1 (42,85%), T2 (60,87%) e T3 (52,18%), não havendo diferença estatística significativa (P=0,418). O percentual de fêmeas com degenerações císticas foi de 33,33% (T1); 39,13%(T2) e 39,13%(T3), não havendo diferença significativa entre os tratamentos (P=0,9057). O melhor intervalo tratamento - ovulação (LH - OV) ocorreu no grupo de fêmeas submetidas ao T2 (38,26 ± 2,84) demonstrado pela menor dispersão dos desvios comparando com T1 (37,17 ± 4,07) e T3 (36,25± 5,69), sendo o valor do desvio padrão diferente estatisticamente do de T3, porém igual ao valor de T1 sendo ainda o valor de T1 igual ao de T3(P<0,05). O intervalo entre a aplicação de eCG e estro do T1(85,33 ± 12,64 horas), T2 (84,40 ±17,50 horas) e T3 (89,14 ± 14,66 horas) foram semelhantes não havendo diferença estatística significativa (P= 0,6954). A duração do estro foi semelhante entre os três tratamentos (P = 0,2653), sendo de 41,44 ± 16,30 horas (T1); 48,57 ± 16,29 horas (T2); 39,33 ± 11,42 horas (T3). O número de Corpos Lúteos em T1 foi de 9,61 ± 5,43 (1-25); em T2 de 9,86 ±3,32 (1-16); em T3 de 8,13 ± 5,52 (0-20), não constatando diferença significativa (P=0,4259). Os menores desvios observados no tratamento T2 sugerem que a combinação de 600 UI de eCG seguida por 2,5 mg de LH após 72 horas, foi a mais efetiva na indução e sincronização do estro e ovulação em fêmeas suínas pré-púberes, considerando a metodologia experimental empregada. Na segunda parte do experimento, foram realizadas inseminações artificiais em tempo fixo em dois esquemas (E) diferentes: O (E1) recebeu uma única dose 36 h após a aplicação de LH e, o (E2) recebeu a primeira dose 24 h e a segunda dose 36 h após a aplicação de LH. As marrãs foram abatidas com 5 dias de gestação e os embriões foram colhidos. Não verificou-se diferença estatística entre os valores obtidos na taxa de recuperação (36,81±5,21 para E1 e 36,91±4,62 para E2), taxa de viabilidade embrionária (TVE) (59,28±6,91 para E1 e 62,25±6,26 para E2), taxa de fecundação (TF) (72,60±7,06 para E1 e 79,33±6,26…
Advisors/Committee Members: Moretti, Anibal de Sant' Anna.
Subjects/Keywords: Gonadotrophin; Gonadotropinas; Ovulação; Ovulation; Puberdade; Puberty; Sincronização do cio; Suínos; Swine; Synchronization of estrus
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APA ·
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APA (6th Edition):
Gama, R. D. (2003). Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10131/tde-14062004-104644/ ;
Chicago Manual of Style (16th Edition):
Gama, Rogério Dantas. “Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs.” 2003. Masters Thesis, University of São Paulo. Accessed March 09, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10131/tde-14062004-104644/ ;.
MLA Handbook (7th Edition):
Gama, Rogério Dantas. “Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs.” 2003. Web. 09 Mar 2021.
Vancouver:
Gama RD. Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs. [Internet] [Masters thesis]. University of São Paulo; 2003. [cited 2021 Mar 09].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-14062004-104644/ ;.
Council of Science Editors:
Gama RD. Emprego de diferentes doses de LH suíno na indução e sincronização da puberdade em marrãs. [Masters Thesis]. University of São Paulo; 2003. Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-14062004-104644/ ;
27.
Reis, Everton Luiz.
Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo.
Degree: Mestrado, Reprodução Animal, 2005, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-30012007-161131/
;
► Este estudo avaliou os efeitos da administração de diferentes doses de eCG em dois momentos distintos no protocolo de sincronização da ovulação para inovulação em…
(more)
▼ Este estudo avaliou os efeitos da administração de diferentes doses de eCG em dois momentos distintos no protocolo de sincronização da ovulação para inovulação em tempo fixo. No dia 0, as receptoras foram tratadas com dispositivo intravaginal contendo progesterona (DIP) e 2,0 mg de Benzoato de Estradiol (BE) associados a 50 mg de progesterona (P4) IM. A partir desse momento, os animais foram divididos homogeneamente para receberem 0,15 mg de d-cloprostenol (PGF2α) e 400, 500 ou 600 UI de eCG no dia 5 (G-400d5, n=101; G-500d5, n=98; G-600d5, n=100, respectivamente) ou no dia 8 (G-400d8, n=100; G-500d8, n=99; G-600d8, n=96, respectivamente; fatorial 3x2). O DIP foi retirado no dia 8 e foi administrado 1 mg de BE no dia 9. No dia 17 os animais foram submetidos a ultra-sonografia ovariana e os que apresentaram mais que um corpo lúteo (CL) ou CL único maior que 18 mm de diâmetro receberam um embrião produzido in vitro. Em um grupo de animais, colheu-se amostras de sangue no dia 17 para determinação da concentração plamática de P4 (CPP4). Os animais tratados com eCG no dia 5 apresentaram maior taxa de aproveitamento [87,0 (260/299) vs. 81,7% (241/295), P<0,05], tendência de maior taxa de concepção [51,8 (132/255) vs. 45,0% (108/295), P=0,07], maior taxa de prenhez [44,1 (132/299) vs. 36,6% (108/295), P<0,05], maior número de CL (1,74 ± 0,09 vs. 1,13 ± 0,03, P<0,05) e maior proporção de receptoras com CL único de maior tamanho [CL 22: 65,7 (111/169) vs. 43,1% (94/218), P<0,05] que os tratados no dia 8. Não se observou efeito de dose sobre a taxa de aproveitamento [400: 82,1 (165/201) vs. 500: 83,8 (165/197) vs. 600: 87,2% (171/196), P<0,05], de concepção [400: 51,8 (85/164) vs. 500: 44,1 (71/161) vs. 600: 49,4% (84/170), P<0,05], de prenhez [400: 42,3 (85/201) vs. 500: 36,0 (71/197) vs. 600: 42,9% (84/196), P<0,05] e sobre a quantidade de receptoras com CL único de maior tamanho [400: 46,8 (65/139) vs. 500: 54,9 (73/133) vs. 600: 57,4 (66/115), P<0,05]. Os animais tratados com 600 UI de eCG apresentaram maior número de CL que os que receberam 400 ou 500 UI (400: 1,17 ± 0,03 vs. 500: 1,33 ± 0,06 vs. 600: 1,82 ± 0,12, P<0,05). No grupo que se determinou a CPP4 verificou-se que os animais que receberam eCG no dia 5 apresentaram maiores CPP4 que os do dia 8 (4,68 ± 0,43 vs. 2,73 ± 0,17 ng/ml, P<0,05). As novilhas tratadas com 600 UI de eCG apresentaram maiores CPP que as tratados com 400 ou 500 UI (400: 2,96 ± 0,22 vs. 500: 3,45 ± 0,38 vs. 600: 4,69 ± 0,55, P<0,05). Receptoras com mais de 1 CL apresentaram tendência de menores perdas gestacionais entre 30 e 60 dias de gestação que as com CL único [10,2 (4/49) vs. 17,5% (33/189), P=0,0547]. Os resultados são indicativos de maior eficiência do protocolo de sincronização da ovulação para transferência de embriões em tempo fixo com o uso de eCG no dia 5. A dose de eCG não influenciou na eficiência do tratamento
The aim of this study was to compare the effects of different doses of eCG administrated at two moments in a fixed-time embryo transfer protocol. On day 0, the…
Advisors/Committee Members: Baruselli, Pietro Sampaio.
Subjects/Keywords: Aborto; Embryo transfer; Gonadotrophin; Gonadotropina; Hormônios progestacionais; Pregnancy loss; Progesterone; Sincronização do cio; Synchronization of estrus; Transferência de embriões
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APA ·
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APA (6th Edition):
Reis, E. L. (2005). Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10131/tde-30012007-161131/ ;
Chicago Manual of Style (16th Edition):
Reis, Everton Luiz. “Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo.” 2005. Masters Thesis, University of São Paulo. Accessed March 09, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10131/tde-30012007-161131/ ;.
MLA Handbook (7th Edition):
Reis, Everton Luiz. “Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo.” 2005. Web. 09 Mar 2021.
Vancouver:
Reis EL. Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo. [Internet] [Masters thesis]. University of São Paulo; 2005. [cited 2021 Mar 09].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-30012007-161131/ ;.
Council of Science Editors:
Reis EL. Efeito da dose e do momento da administração de gonadotrofina coriônica eqüina (eCG) no protocolo de sincronização da ovulação para transferência de embriões em tempo fixo. [Masters Thesis]. University of São Paulo; 2005. Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-30012007-161131/ ;
28.
Almeida, Alexandre Barreto de.
Reutilização de implantes de norgestomet em vacas da raça Nelore.
Degree: Mestrado, Reprodução Animal, 2003, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-12072007-083859/
;
► Compararam-se as taxas de prenhez (TP) em vacas Nelore (Bos taurus indicus) utilizando implantes de norgestomet novos ou reutilizados associados ao valerato de estradiol (VE)…
(more)
▼ Compararam-se as taxas de prenhez (TP) em vacas Nelore (Bos taurus indicus) utilizando implantes de norgestomet novos ou reutilizados associados ao valerato de estradiol (VE) e benzoato de estradiol (BE). Duzentos e quarenta e uma vacas Nelore amamentando foram separadas em dois grupos, e receberam implante auricular contendo 3 mg de norgestomet (n=122) ou implante de norgestomet (n=119) que já havia sido previamente utilizado por 10 dias. Os animais que receberam implante novo ou reutilizado, foram sub-divididos, e um lote recebeu uma injeção (IM) de 3 mg de norgestomet associados a 5 mg de valerato de estradiol e o outro, uma injeção (IM) de 50 mg de progesterona associados a 2 mg de benzoato de estradiol. No momento da retirada do implante todos os animais receberam 1 aplicação de análogo de PGF2α (IM) para assegurar a luteólise e 24 h após uma injeção de 1,0 mg de BE (IM). A inseminação artificial em tempo fixo (IATF) ocorreu 54-56 h após a retirada do implante. Não houve interação entre tipo de implante e tipo de éster de estradiol para TP IATF nem TP Final. As TP IATF não diferiram entre animais que receberam implante novo ou reutilizado (48,3 vs 48,7%) nem entre os que receberam VE ou BE (49,5 vs 47,5%). O mesmo ocorreu para TP Final segundo tipo de implante, novo ou reutilizado (85,2 vs 86,5%) e segundo tipo de éster de estradiol, VE ou BE (86,5 vs 85,2%). Conclui-se que vacas Nelore amamentando podem apresentar adequadas TP IATF e TP Final quando tratadas por implantes de norgestomet novos ou reutilizados associados indistintamente ao valerato ou benzoato de estradiol.
Pregnacy rates (PR) were compared in Nelore cows (Bos taurus indicus) using new or used norgestomet implants associated to estradiol valerate (EV) and estradiol benzoate (EB). Two hundred forty one Nelore cows were synchronized and divided in two groups, they received auricular implants with 3 mg of norgestomet (n=122) or used norgestomet implants (n=119) previously used for 10 days. The animals that received new or used implants were sub-divided and received an administration (im) of 3 mg of norgestomet plus 5 mg of EV and another group received an administration of 50 mg of progesterone plus 2 mg of EB. When the implant was removed a dose of PGF2α analogous was given for all animals to assure luteolysis and 24 h later they received (im) of 1,0 mg of EB. The fixed-timed artificial insemination (AIFT) occurred 54-56 h after implant withdrawal. There was no difference between the two implants as well as no diffrence to EV or EB, neither PR AITF nor PR Finish. The PR AIFT did not differ among animals that received that received new or used implants (48,3 vs 48,7%) neither EV nor EB (49,5 vs 47,5%). The same happened to PR Finish either new or used (85,2 vs 86,5%) when EV or EB (86,5 vs 85,2%) were used. In this present study, it was concluded that Nelore suckling cows can show a regulated PR AIFT and PR Finish after treatments with new or used norgestomet implants associated to EV or EB.
Advisors/Committee Members: Madureira, Ed Hoffmann.
Subjects/Keywords: Benzoato de estradiol; Estradiol benzoate; Estradiol valerate; Estrus synchronization; Nelore; Nelore; Norgestomet; Norgestomet; Sincronização do cio; Valerato de estradiol
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APA ·
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MLA ·
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APA (6th Edition):
Almeida, A. B. d. (2003). Reutilização de implantes de norgestomet em vacas da raça Nelore. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10131/tde-12072007-083859/ ;
Chicago Manual of Style (16th Edition):
Almeida, Alexandre Barreto de. “Reutilização de implantes de norgestomet em vacas da raça Nelore.” 2003. Masters Thesis, University of São Paulo. Accessed March 09, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10131/tde-12072007-083859/ ;.
MLA Handbook (7th Edition):
Almeida, Alexandre Barreto de. “Reutilização de implantes de norgestomet em vacas da raça Nelore.” 2003. Web. 09 Mar 2021.
Vancouver:
Almeida ABd. Reutilização de implantes de norgestomet em vacas da raça Nelore. [Internet] [Masters thesis]. University of São Paulo; 2003. [cited 2021 Mar 09].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-12072007-083859/ ;.
Council of Science Editors:
Almeida ABd. Reutilização de implantes de norgestomet em vacas da raça Nelore. [Masters Thesis]. University of São Paulo; 2003. Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-12072007-083859/ ;
Freie Universität Berlin
29.
Kuchenbuch, Swantje.
Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus.
Degree: 2001, Freie Universität Berlin
URL: http://dx.doi.org/10.17169/refubium-8760
► This study was conducted to improve reproductive efficiency and to increase the knowledge of follicular dynamics after synchronization of estrus with GnRH and Prostaglandin F2…
(more)
▼ This study was conducted to improve reproductive efficiency and to increase
the knowledge of follicular dynamics after
synchronization of
estrus with GnRH
and Prostaglandin F2 in dairy heifers. Three experiments were carried out on a
confinement housing heifer raising unit in Brandenburg. Each experiment
compared reproductive management protocols based on
synchronization of
estrus
by means of treating heifers with GnRH (Fertagyl Intervet) 7 days apart. The
control group of all experiments was watched for signs of
estrus during 5 days
after the administration of PGF2. In experiment 1 this procedure (Group 1a)
was compared to two timed artificial inseminations (TAI) carried out 72 and 96
hours after the application of PGF2(Group 2). In experiment 2 Group 1b was
compared to a group inseminated twice at 72 and 104 hours after treatment with
PGF2(Group 3). In experiment 3, Group 1c was compared to Group 4. Heifers in
Group 4 were inseminated twice at 72 and 96 hours after treatment with PGF2
but received a second dose of GnRH at the first insemination. Follicular
dynamics were observed by ultrasound during a period between 48 and 104 hours
after PGF2 in all groups. Examinations were carried out twice daily in the
morning and in the afternoon on three consecutive days. The diameter of large
follicles was documented in a spreadsheet. An ovulation was characterized by
the disappearance of a large diameter follicle, that had been observed during
the previous examination. In experiment 1 conception rates did not differ
between the two groups (46.9 % vs. 53.6 %, p>0.05). However, as all heifers in
Group 2 were inseminated, pregnancy rates on induced
estrus were higher in
Group 2 (40.6 % vs. 53.6 %, p<0.05). Insemination of heifers returning to
estrus in Group 1a compensated for this (Conception rate: 88,2%), so that the
number of pregnancies per time interval was significantly higher in Group 1a
than in Group 2.
Advisors/Committee Members: n (gender), Univ. -Prof. Dr. W. Heuwieser (firstReferee), Univ.- Prof. Dr. R. Mansfeld (furtherReferee), Univ.- Prof. Dr. Zessin (furtherReferee).
Subjects/Keywords: Heifers; Estrus; Synchronization; Reproduction; Management; 600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kuchenbuch, S. (2001). Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus. (Thesis). Freie Universität Berlin. Retrieved from http://dx.doi.org/10.17169/refubium-8760
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kuchenbuch, Swantje. “Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus.” 2001. Thesis, Freie Universität Berlin. Accessed March 09, 2021.
http://dx.doi.org/10.17169/refubium-8760.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kuchenbuch, Swantje. “Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus.” 2001. Web. 09 Mar 2021.
Vancouver:
Kuchenbuch S. Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus. [Internet] [Thesis]. Freie Universität Berlin; 2001. [cited 2021 Mar 09].
Available from: http://dx.doi.org/10.17169/refubium-8760.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kuchenbuch S. Reproductive management in dairy heifers: Comparison of timed artificial
insemination and insemination on observed estrus. [Thesis]. Freie Universität Berlin; 2001. Available from: http://dx.doi.org/10.17169/refubium-8760
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Duran, Benjamin James.
Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep.
Degree: 2018, Iowa State University
URL: https://lib.dr.iastate.edu/etd/16572
► During the 2016 and 2017 breeding seasons, a total of 462 producer-owned ewes were presented at the Iowa State University large animal hospital for laparoscopic…
(more)
▼ During the 2016 and 2017 breeding seasons, a total of 462 producer-owned ewes were presented at the Iowa State University large animal hospital for laparoscopic artificial insemination (LAI). A retrospective analysis was performed using these clinical data to investigate factors that potentially influence the success of LAI. Because not all producers provided pregnancy data, only 310 ewes were used for the final analysis. One hundred eighty-eight of 310 ewes (60.6%) became pregnant following LAI, and pregnancy rate was affected (P<0.001) by year. Uterine tone at the time of LAI had no effect (P>0.23) on pregnancy rate. Semen having a post-thaw motility rate of less than 50% produced a lower (P=0.0314) pregnancy rate (29.4%) than semen with post-thaw motility above 65% (pregnancy rate of 60.5%); post-thaw motility between 50-65% was intermediate (pregnancy rate of 54.1%). In one year, there was a tendency (P<0.10) for higher pregnancy rates in ewes whose estrus was synchronized with progesterone for 10 days (52.6%) than in ewes treated for 7 days (31.6%). Results of this study revealed that the degree of uterine tone observed at the time of LAI is not predictive of pregnancy rate and that semen post-thaw motility, as well as the duration of progesterone treatment during synchronization of estrus for LAI, can influence pregnancy outcome resulting from LAI in sheep.
Subjects/Keywords: Artificial Insemination; CIDR; Laparoscopic; Pregnancy; Sheep; Synchronization of estrus; Agriculture; Animal Sciences
…progesterone treatment during synchronization of estrus for
LAI, can influence pregnancy outcome… …to maximize pregnancy rates. Protocols for
synchronization of estrus vary widely among… …ewe, artificial insemination, synchronization of estrus
with exogenous hormones… …cervical, intrauterine).
11
Synchronization of estrus
To help control the cyclicity of the… …releasing devices during the normal breeding
season result in effective synchronization of estrus…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Duran, B. J. (2018). Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/16572
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Duran, Benjamin James. “Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep.” 2018. Thesis, Iowa State University. Accessed March 09, 2021.
https://lib.dr.iastate.edu/etd/16572.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Duran, Benjamin James. “Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep.” 2018. Web. 09 Mar 2021.
Vancouver:
Duran BJ. Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep. [Internet] [Thesis]. Iowa State University; 2018. [cited 2021 Mar 09].
Available from: https://lib.dr.iastate.edu/etd/16572.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Duran BJ. Investigation into factors potentially influencing the success of laparoscopic artificial insemination in sheep. [Thesis]. Iowa State University; 2018. Available from: https://lib.dr.iastate.edu/etd/16572
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
