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1.
河部, 展.
アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ.
Degree: Nara Institute of Science and Technology / 奈良先端科学技術大学院大学
URL: http://hdl.handle.net/10061/2554 
Subjects/Keywords: CIDR; リナンバリング
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APA (6th Edition):
河部, . (n.d.). アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ. (Thesis). Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10061/2554
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
河部, 展. “アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ.” Thesis, Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Accessed January 22, 2021.
http://hdl.handle.net/10061/2554.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
河部, 展. “アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ.” Web. 22 Jan 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
河部 . アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ. [Internet] [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10061/2554.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
河部 . アドレス・プリフィクスの動的割り当て機構の提案と実装 : アドレス・プリフィックス ノ ドウテキ ワリアテ キコウ ノ テイアン ト ジッソウ. [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; Available from: http://hdl.handle.net/10061/2554
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
University of Arizona
2.
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 January 22, 2021.
http://hdl.handle.net/10150/217055.
MLA Handbook (7th Edition):
Fish, Ronald Dean. “Estrus Synchronization of Beef and Dairy Cows
.” 2011. Web. 22 Jan 2021.
Vancouver:
Fish RD. Estrus Synchronization of Beef and Dairy Cows
. [Internet] [Doctoral dissertation]. University of Arizona; 2011. [cited 2021 Jan 22].
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
Universidade Federal de Viçosa
3.
Marcelo Milagres Rosado.
Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro.
Degree: 2010, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4498
► Com o objetivo de estudar o efeito de diferentes protocolos de sincronização de estro (Uso de cloprostenol no momento da colocação do implante intravaginal e…
(more)
▼ Com o objetivo de estudar o efeito de diferentes protocolos de sincronização de estro (Uso de cloprostenol no momento da colocação do implante intravaginal e sua permanência por período de oito e nove dias) sobre a taxa de prenhez em receptoras bovinas Bos taurus indicus x Bos taurus taurus, inovuladas com embriões de PIV, o presente estudo utilizou 1933 receptoras (3.649 tratamentos) divididas em 6 protocolos. No protocolo 1, as receptoras receberam 2,0 mg de Benzoato de estradiol (BE) e 500 μg de cloprostenol, e um dispositivo intravaginal (1,9 g de Progesterona) que permaneceu por 8 dias. No momento da retirada do dispositivo intravaginal cada receptora recebeu uma dose única de 0,5 mg de Cipionato de estradiol (CE), 500 μg de Cloprostenol e 400 UI de gonadotrofina coriônica eqüina (eCG). No protocolo 2, as receptoras receberam o mesmo tratamento que o primeiro grupo, porém sem a dose de 500 μg de Cloprostenol na colocação do dispositivo intravaginal de progesterona. No protocolo 3, as receptoras receberam no momento da colocação do dispositivo intravaginal de progesterona uma dose única de 500 μg de Cloprostenol e 2,0 mg de BE, sendo que o dispositivo permaneceu por 9 dias. Dois dias antes da retirada do dispositivo intravaginal (dia 7) as fêmeas receberam uma dose única de 500 μg de Cloprostenol, e no momento da retirada do implante, receberam uma dose única de 0,5 mg de CE e 400 UI de eCG. No protocolo 4, as receptoras receberam o mesmo tratamento que o protocolo 3, porém sem Cloprostenol na colocação do dispositivo intravaginal de progesterona. No protocolo 5, as receptoras receberam 2,0 mg de Benzoato de estradiol, e um dispositivo intravaginal de progesterona por 9 dias. Dois dias antes da retirada, no dia 7, receberam 500 μg de Cloprostenol e no momento da retirada do implante 0,5mg de CE e 300 UI de eCG. No protocolo 6, as receptoras receberam 2,0 mg de BE, e um dispositivo intravaginal de progesterona que permaneceu por 8 dias. No momento da retirada do dispositivo intravaginal, cada receptora recebeu 0,5 mg de CE, 500 μg de Cloprostenol e 300 UI de eCG. Todas as receptoras que apresentaram corpo lúteo foram inovuladas em média 10 dias após a retirada do dispositivo, ou seja, por volta de 8 dias após estro; e avaliadas por meio de ultrassonografia aos 58 dias após inovulação para o diagnóstico de gestação. Os dados foram submetidos a análises estatísticas descritivas (distribuição de freqüência) e os dados qualitativos foram arranjados em tabelas de contingência e analisados pelo teste de qui-quadrado a 5 % de probabilidade de erro. As receptoras do quarto protocolo apresentaram as melhores (p<0,05) taxas de aproveitamento (84,9%). No entanto, o número de tratamentos realizados (n=86) para o protocolo 4 foi reduzido em relação aos demais protocolos, mais estudos tornam-se necessários para confirmar a eficácia desse protocolo. Receptoras que receberam PGF2α 48 horas antes da retirada do dispositivo apresentaram melhores índices de aproveitamento de receptoras…
Advisors/Committee Members: Ciro Alexandre Alves Torres, Eduardo Paulino da Costa, José Domingos Guimarães, Tarcízio Antônio Rego de Paula, Claudio José Borela Espeschit, João Henrique Moreira Viana.
Subjects/Keywords: Bovinos, Transferência de Embriões, PIV, CIDR; REPRODUCAO ANIMAL; Cattle; CIDR; Embryo transfer; in vitro fertilization
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APA (6th Edition):
Rosado, M. M. (2010). Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4498
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):
Rosado, Marcelo Milagres. “Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro.” 2010. Thesis, Universidade Federal de Viçosa. Accessed January 22, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4498.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rosado, Marcelo Milagres. “Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro.” 2010. Web. 22 Jan 2021.
Vancouver:
Rosado MM. Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro. [Internet] [Thesis]. Universidade Federal de Viçosa; 2010. [cited 2021 Jan 22].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4498.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rosado MM. Uso de protocolo de sincronização de estro em receptoras mestiças inovuladas com embriões in vitro. [Thesis]. Universidade Federal de Viçosa; 2010. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4498
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 January 22, 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. 22 Jan 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 Jan 22].
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
Angelo State University
5.
Calhoun, Andy Kyle.
Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season.
Degree: MS, Animal Science, 2012, Angelo State University
URL: http://hdl.handle.net/2346.1/30022
► The lack of effective, consistent synchronization protocols for ewes is a barrier to the use of artificial insemination in sheep. This study compared the estrus…
(more)
▼ The lack of effective, consistent synchronization protocols for ewes is a barrier to the use of
artificial insemination in sheep. This study compared the estrus and ovulation percentage and
window of synchrony of estrus and ovulation for ewes synchronized with three experimental
protocols. The industry’s current standard protocol using PG600, an 11 d
CIDR and PGF2a
was compared to two alternative protocols utilizing GnRH, a 7 d
CIDR and PGF2a. Forty
Suffolk ewes were divided into 5 groups and each group was placed on a different protocol.
Blood sampling began 18 h following
CIDR removal and samples were collected every 2 h
for 19 consecutively collections. Mean serum concentrations of LH differed between groups
(P<0.05) from 22-42 h following
CIDR removal. The two protocols using the shorter 7 d
progestin regimen and GnRH to control follicular dynamics resulted in higher estrus and
ovulation rates and an acceptable window of synchrony.
Advisors/Committee Members: Angelo State University. Department of Agriculture. (other), Dickison, Will J. (committee member), Salisbury, Micheal (committee member), Scott, Cody (committee member), Keith, Susan (committee member).
Subjects/Keywords: ewes; artificial insemination; estrus; ovulation; GnRH; CIDR; PGF2a; Suffolk ewes
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APA (6th Edition):
Calhoun, A. K. (2012). Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season. (Masters Thesis). Angelo State University. Retrieved from http://hdl.handle.net/2346.1/30022
Chicago Manual of Style (16th Edition):
Calhoun, Andy Kyle. “Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season.” 2012. Masters Thesis, Angelo State University. Accessed January 22, 2021.
http://hdl.handle.net/2346.1/30022.
MLA Handbook (7th Edition):
Calhoun, Andy Kyle. “Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season.” 2012. Web. 22 Jan 2021.
Vancouver:
Calhoun AK. Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season. [Internet] [Masters thesis]. Angelo State University; 2012. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2346.1/30022.
Council of Science Editors:
Calhoun AK. Effects of GnRH and prostaglandin combined with a short progestin regimen on the synchrony of estrus and ovulation in ewes during the breeding season. [Masters Thesis]. Angelo State University; 2012. Available from: http://hdl.handle.net/2346.1/30022
Colorado State University
6.
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 ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
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 January 22, 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. 22 Jan 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 Jan 22].
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
Iowa State University
7.
Grussing, Tyler.
Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle.
Degree: 2018, Iowa State University
URL: https://lib.dr.iastate.edu/etd/16362
► Removal of the initial GnRH administration within the 5-d CO-Synch + controlled internal drug release (CIDR) protocol (5dCO) on ovarian parameters and fixed timed artificial…
(more)
▼ Removal of the initial GnRH administration within the 5-d CO-Synch + controlled internal drug release (CIDR) protocol (5dCO) on ovarian parameters and fixed timed artificial insemination (FTAI) pregnancy rates was investigated. In the first study, the objective was to evaluate the effects of GnRH removal on ovarian follicle dynamics and steroid hormone concentrations in non-lactating beef cows. Animals received either: 1) standard 5dCO hormone administration including 100 õg of GnRH at CIDR insertion and two concurrent, 25-mg doses of prostaglandin F2α (PGF2α) delivered at CIDR removal (G1-2PG), 2) no GnRH at CIDR insertion and two concurrent, 25-mg doses of PGF2α at CIDR removal (NoG1-2PG), or 3) no GnRH at CIDR insertion and a single, 25-mg dose of PGF2α at CIDR removal (NoG1-1PG). Cows in the NoG1-2PG treatment group displayed elevated peak plasma estradiol concentrations when compared to the NoG1-1PG treatment group with G1-2PG remaining intermediate. However, the remaining steroid hormone concentrations analyzed were not impacted by treatment. Furthermore, the ovarian parameters measured were not different among treatments.
In order to determine if fluctuations in estradiol concentrations observed in the first study would impact fertility, a field study was conducted. The objective of the field study was to evaluate the effect of initial GnRH removal at CIDR insertion on dominant follicle parameters and FTAI pregnancy rates in lactating beef cows. Cows were administered one of three treatments identical to the first study with the exception of FTAI occurring 72 h following CIDR removal. Although dominant follicle diameter was similar upon CIDR insertion, dominant follicle was greater in the NoG1-2PG treatment group upon CIDR removal. Estrous response prior to FTAI was not different among treatments, but NoG1-1PG did display more advanced (lower) estrous detection aid scores at FTAI. However, FTAI pregnancy rates did not differ among treatments.
In summary, the data from these two studies indicate that removal of the initial GnRH administration in the 5dCO does not negatively affect ovarian parameters or FTAI pregnancy rates. However, differences in dominant follicle diameter and changes in estradiol concentrations, as well as behavioral estrus, prior to FTAI warrant further research.
Subjects/Keywords: Bovine; CIDR; GnRH; Reproduction; Synchronization; Agriculture; Animal Sciences
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APA (6th Edition):
Grussing, T. (2018). Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/16362
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):
Grussing, Tyler. “Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle.” 2018. Thesis, Iowa State University. Accessed January 22, 2021.
https://lib.dr.iastate.edu/etd/16362.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Grussing, Tyler. “Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle.” 2018. Web. 22 Jan 2021.
Vancouver:
Grussing T. Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle. [Internet] [Thesis]. Iowa State University; 2018. [cited 2021 Jan 22].
Available from: https://lib.dr.iastate.edu/etd/16362.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Grussing T. Effects of initial GnRH removal from 5-d CO-Synch + CIDR protocol on ovarian parameters and fixed timed artificial insemination pregnancy rates in beef cattle. [Thesis]. Iowa State University; 2018. Available from: https://lib.dr.iastate.edu/etd/16362
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Kansas State University
8.
Mellieon, Harold Irvin Jr.
Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI.
Degree: MS, Department of Animal Sciences
and Industry, 2011, Kansas State University
URL: http://hdl.handle.net/2097/10749
► Our objectives were to determine: the effectiveness of upfront PGF2α injection to regress the corpus luteum; ovulation response to GnRH; and pregnancy outcomes. Dairy heifers…
(more)
▼ Our objectives were to determine: the effectiveness of
upfront PGF2α injection to regress the corpus luteum; ovulation
response to GnRH; and pregnancy outcomes. Dairy heifers (n = 545)
from three locations (Florida, Kansas, and Mississippi) were
assigned randomly to each of two treatments: 1) 25 mg of PGF2α
injection and insertion of previously used autoclaved
CIDR on d 7
followed by 100 µg of GnRH administered on d 5, and a 25 mg PGF2α
injection at
CIDR removal (7D) on d 0; 2) 100 µg of GnRH and
insertion of previously used autoclaved
CIDR on d 5 and 25 mg of
PGF2α injection at
CIDR removal (5D) on d 0. Artificial
insemination (AI) occurred after detected estrus from d 0 to 3.
Those heifers not detected in estrus were inseminated on d 3 and
given a second 100 µg of GnRH. Blood collected on d 7 and 5 was
assayed to determine concentrations of progesterone, presence of a
CL (progesterone ≥1 ng/mL) on d 7, and whether luteolysis occurred
in 7D heifers. Blood progesterone concentration from d 0 and 3
determined if luteolysis occurred in all heifers. Ovarian structure
maps on d 5 and 0 were used to determine ovulation in response to
GnRH on d 5. Pregnancy was determined on d 32 and 60 and
intervening pregnancy loss was calculated. Of those heifers in the
7D treatment having progesterone ≥1 ng/mL on d 7, the proportion
having progesterone <1 ng/mL 2 d later (luteolysis) was greater
(P < 0.05) than that in the 5D treatment (43.0 vs. 22.9%,
respectively). Total proportion of follicles that ovulated per
heifer was numerically greater in the 7D treatment but only
differed (P < 0.05) between locations. A treatment x location
interaction was detected for pregnancy rates per AI. The Kansas
location had no detectable treatment differences. In contrast, the
7D treatment produced greater (P < 0.05) pregnancy rates in the
first replicate of the Florida location and at the Mississippi
location. We concluded that the 5D protocol was not effective in
producing acceptable luteolysis, pregnancy, and ovulation rates in
comparison with the modified 7D protocol.
Advisors/Committee Members: Jeffrey S. Stevenson.
Subjects/Keywords: Heifers;
CIDR; Artificial
insemination;
Synchronization; Agriculture, General (0473); Animal Sciences (0475)
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APA (6th Edition):
Mellieon, H. I. J. (2011). Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/10749
Chicago Manual of Style (16th Edition):
Mellieon, Harold Irvin Jr. “Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI.” 2011. Masters Thesis, Kansas State University. Accessed January 22, 2021.
http://hdl.handle.net/2097/10749.
MLA Handbook (7th Edition):
Mellieon, Harold Irvin Jr. “Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI.” 2011. Web. 22 Jan 2021.
Vancouver:
Mellieon HIJ. Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI. [Internet] [Masters thesis]. Kansas State University; 2011. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2097/10749.
Council of Science Editors:
Mellieon HIJ. Evaluation of
the 5-day vs. 7-day Co-Synch + CIDR protocol in dairy heifers using
timed AI. [Masters Thesis]. Kansas State University; 2011. Available from: http://hdl.handle.net/2097/10749
Virginia Tech
9.
Cornwell, Jeffrey M.
The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol.
Degree: MS, Dairy Science, 2005, Virginia Tech
URL: http://hdl.handle.net/10919/42357
► The objectives of this study were to determine if fixed-timed artificial insemination (FTAI) at two different times, 0 or 24 h after GnRH administration, in…
(more)
▼ The objectives of this study were to determine if fixed-timed artificial insemination (FTAI) at two different times, 0 or 24 h after GnRH administration, in a Presynch-Ovsynch protocol influenced the pregnancy rate (PR) when average and high fertility sires were used. Additionally, a second experiment was conducted to determine the effectiveness of
CIDR inserts to allow for resynchronization of estrus in cows that did not conceive or maintain the conceptus at FTAI. Lactating Holstein cows (n = 1,457) from two well-managed dairy herds located in the piedmont region of North Carolina were utilized for 12 mo. First artificial insemination (AI) PR differed for fertility group and was 24.1 and 29.2% for average and high fertility group, respectively. Timing of AI did not influence first AI PR and there was no interaction of fertility group and timing of AI. Cows that received a
CIDR insert were detected more frequently in estrus during a 4 d period, d 21 to 24, than control cows, 92.5 and 62.0%, respectively. However, the
CIDR insert did not increase the detection of estrus compared to control cows over a normal estrus return interval of 7 d, 18 to 24 d after GnRH administration of a FTAI protocol, 28.8 and 34.2% respectively. In conclusion, the use of high fertility sires is a practical recommendation for improving first AI PR and
CIDR inserts allowed more cows to be detected in estrus during a shorter interval, but did not increase the estrus detection rate during a normal estrus return interval.
Advisors/Committee Members: Nebel, Raymond L. (committeechair), Akers, Robert Michael (committee member), Kasimanickam, Ramanathan (committee member), McGilliard, Michael L. (committee member).
Subjects/Keywords: CIDR; resynchronization; sire fertility; ERCR
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APA (6th Edition):
Cornwell, J. M. (2005). The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/42357
Chicago Manual of Style (16th Edition):
Cornwell, Jeffrey M. “The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol.” 2005. Masters Thesis, Virginia Tech. Accessed January 22, 2021.
http://hdl.handle.net/10919/42357.
MLA Handbook (7th Edition):
Cornwell, Jeffrey M. “The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol.” 2005. Web. 22 Jan 2021.
Vancouver:
Cornwell JM. The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol. [Internet] [Masters thesis]. Virginia Tech; 2005. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10919/42357.
Council of Science Editors:
Cornwell JM. The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol. [Masters Thesis]. Virginia Tech; 2005. Available from: http://hdl.handle.net/10919/42357
10.
Azevedo, Carla Maria Lopes de.
Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal.
Degree: 2016, RCAAP
URL: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5648
► Dissertação de Mestrado Integrado em Medicina Veterinária
O principal objectivo do presente trabalho foi comparar os efeitos do protocolo COsynch-64 + CIDR, normalmente usado em…
(more)
▼ Dissertação de Mestrado Integrado em Medicina Veterinária
O principal objectivo do presente trabalho foi comparar os efeitos do protocolo COsynch-64 + CIDR, normalmente usado em vacadas de carne, com outros 2 protocolos (Ovsynch-
64 e Ovsynch-64 + CIDR) na taxa de gestação (TG) à 1ª e/ou 2ª inseminação artificial (IA),
retorno regular ao estro e intervalo entre partos (IEP) de vacas leiteiras de alta produção, em 6
explorações leiteiras comerciais Portuguesas. Entre Abril de 2009 e Março de 2010, foram
usadas vacas da raça Holstein-Frísia, sem doença aparente do foro reprodutivo. As fêmeas
(n=266) foram aleatoriamente distribuídas a partir do 40º dia após o parto pelos grupos B
(Ovsynch-64; n = 66), C (Ovsynch-64 + CIDR; n = 70) e D (COsynch-64 + CIDR; n = 62). O
grupo A (grupo controlo; n = 68) foi constituído por animais aos quais se realizou a IA, após
cio natural, durante o intervalo quinzenal ou mensal das visitas de controlo reprodutivo. As
vacas, cujo retorno ao estro foi observado 18 a 24 dias após a 1ª IA, foram re-inseminadas (2ª
IA). A TG1ªIA foi similar entre os grupos A (39,7%; 27/68), B (33,3%; 22/66), C (34,3%;
24/70) e D (40,3%; 25/62; P = 0,78). Foi observada uma tendência para uma maior taxa de
retorno ao estro do grupo D (59,4%; 22/37) relativamente ao grupo B (38,6%; 17/44; P =
0,06). O somatório das vacas gestantes à 1ª IA e das que retornaram ao estro após aquela inseminação
foi maior no grupo D (75,8%; 47/62) do que grupo B (59.1%; 39/66; P = 0,04).
Também foi observada uma tendência para uma maior TG2ªIA do grupo D (45,5%; 10/22) do
que nos grupos A (20,0%; 4/20; P = 0,08) ou B (17,6%; 3/17; P = 0,07). Observou-se uma
menor TGglobal no grupo B (37,9%; 25/66; P = 0,04) ou uma tendência para uma menor TGglobal
no grupo C (41,4%; 29/70; P = 0,09) do que no grupo D (56,5%; 35/62). O IEP, mas não o
intervalo parto-1ªIA, foi menor no grupo D (425,9 ± 78,8 dias; n = 49; P = 0,003) do que nos
grupos B (475,3 ± 83,7 dias; n = 43) e C (468,6 ± 80,6 dias; n = 51). Concluímos que embora
se tenha observado uma TG1ªIA similar entre os grupos, o protocolo COsynch-64 + CIDR demonstrou
ser uma alternativa viável e potencialmente superior aos restantes protocolos hormonais
na melhoria da eficiência reprodutiva de vacas altas produtoras.
The main aims of the present study were to compare the pregnancy rate (PR) at 1st and 2nd AI,
regular returns to estrus and calving interval of a COsynch-64 + CIDR, commonly used to
synchronize ovulation in beef cows, with Ovsynch-64 and Ovsynch-64 + CIDR protocols in
high-producing dairy cows from six commercial Portuguese dairy herds. Holstein-Friesian
cows (n = 266), ≥ 40 days postpartum and without reproductive tract disease, were randomly
assigned to groups B (Ovsynch-64; n = 66), C (Ovsynch-64 + CIDR; n = 70) or D (COsynch-
64 + CIDR; n = 62). Cows inseminated after natural estrus were the control group (group A; n
= 68). Non-pregnant cows with return to estrus between 18 and 24 days after 1st AI were reinseminated
(2nd AI). The PR at 1st AI was similar between…
Advisors/Committee Members: Simões, João Carlos Caetano, Canada, Nuno Figueira Boavida.
Subjects/Keywords: Hormonas; Protocolos (COsynch-64+CIDR, Ovsynch); Sincronização do estro; Fertilidade; Inseminação artificial; Vaca leiteira
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APA ·
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APA (6th Edition):
Azevedo, C. M. L. d. (2016). Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal. (Thesis). RCAAP. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5648
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):
Azevedo, Carla Maria Lopes de. “Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal.” 2016. Thesis, RCAAP. Accessed January 22, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5648.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Azevedo, Carla Maria Lopes de. “Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal.” 2016. Web. 22 Jan 2021.
Vancouver:
Azevedo CMLd. Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal. [Internet] [Thesis]. RCAAP; 2016. [cited 2021 Jan 22].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5648.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Azevedo CMLd. Avaliação do efeito de três protocolos hormonais de sincronização da ovulação na eficiência reprodutiva de vacas de alta produção em explorações leiteiras do Norte de Portugal. [Thesis]. RCAAP; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:http://repositorio.utad.pt/:10348/5648
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Georgia
11.
Fain, Jillian L.
Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/22906
► Study 1 combined the CIDR insert for ovulation synchronization and TAI. Animals received 50 µg GnRH (-9 d), CIDR (1.38 g progesterone) (-9 d), 25…
(more)
▼ Study 1 combined the CIDR insert for ovulation synchronization and TAI. Animals received 50 µg GnRH (-9 d), CIDR (1.38 g progesterone) (-9 d), 25 mg PGF (-3 d), 1 mg ECP 2 .(-2 d), -CIDR (-2 d), GnRH (d 0), and TAI (0 d), (OverSynch; n=20)
or CIDR (-9 d), PGF2 . (-3 d), -CIDR (-2 d), and TAI (0 d) (Control; n=20). Pregnancy rates did not differ (P > 0.05); however, estrus activity was increased with OverSynch (P < 0.05). Study 2 utilized the CIDR to decrease embryonic loss and for
reuse in resynchronization post AI. Supplementation had no effect on pregnancy rates, regardless of season (P > 0.05). Progesterone concentrations post AI tend to be higher in heifers than in cows (P = 0.0651) and in dairy versus beef heifers (P <
0.05). Overall, d 21 progesterone concentrations is positively correlated with d 35 pregnant diagnosis (P = 0.004).
Subjects/Keywords: Controlled Internal Drug Release (CIDR); Timed AI (TAI); Progesterone,Embryonic Loss; Dairy Cattle
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APA ·
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APA (6th Edition):
Fain, J. L. (2014). Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/22906
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):
Fain, Jillian L. “Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle.” 2014. Thesis, University of Georgia. Accessed January 22, 2021.
http://hdl.handle.net/10724/22906.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fain, Jillian L. “Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle.” 2014. Web. 22 Jan 2021.
Vancouver:
Fain JL. Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10724/22906.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fain JL. Evaluating the effectiveness of using the controlled internal drug release (CIDR) insert for synchronization of estrus and post-insemination progesterone therapy to improve reproductive performance of dairy cattle. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/22906
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
North Carolina State University
12.
Carothers, Randolph Erwin.
The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress.
Degree: MS, Animal Science, 2006, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/2176
► Two trials were conducted to determine the effects of progesterone administered by controlled intravaginal drug release devices (CIDRs) on pregnancy rates and serum progesterone concentrations…
(more)
▼ Two trials were conducted to determine the effects of progesterone administered by controlled intravaginal drug release devices (CIDRs) on pregnancy rates and serum progesterone concentrations in heat stressed dairy cows. Trial 1 utilized a
CIDR from days 5 through 12 after breeding, and trial 2 utilized a
CIDR from days 5 through 19 after breeding. Rectal temperatures and blood samples were obtained from cows every other day throughout the trial. Serum progesterone concentrations were measured with radioimmunoassay (RIA). Pregnancy status was determined on approximately day 30 via transrectal ultrasonography. Mean temperature-humidity index (THI) values were 73.5 for trial 1 and 75.1 for trial 2. These THI values indicated that cows in both trials were subjected to mild heat stress conditions. No significant differences were found between
CIDR treated and control cows in serum progesterone concentrations. In trial 1, pregnancy rates were 31.8% vs. 33.3% for control and
CIDR treated cows, respectively (p = 0.25). In trial 2 pregnancy rates were 33.3% vs. 26.7% for control and
CIDR treated cows, respectively (p = 0.29). In conclusion, supplemental progesterone administered to heat stressed dairy cows after breeding did not improve pregnancy rates or increase serum progesterone concentrations.
Advisors/Committee Members: G.W. Smith, Committee Member (advisor), M.E. Hockett, Committee Member (advisor), P.W. Farin, Committee Member (advisor), C.S. Whisnant, Committee Chair (advisor).
Subjects/Keywords: heat stress; progesterone; CIDR; dairy cattle
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APA ·
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Export
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Manager
APA (6th Edition):
Carothers, R. E. (2006). The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/2176
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):
Carothers, Randolph Erwin. “The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress.” 2006. Thesis, North Carolina State University. Accessed January 22, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/2176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Carothers, Randolph Erwin. “The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress.” 2006. Web. 22 Jan 2021.
Vancouver:
Carothers RE. The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress. [Internet] [Thesis]. North Carolina State University; 2006. [cited 2021 Jan 22].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/2176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Carothers RE. The Effects of Post-insemination Progesterone Supplementation on Pregnancy Rates and Serum Progesterone in Dairy Cows Exposed to Mild Heat Stress. [Thesis]. North Carolina State University; 2006. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Waikato
13.
Waugh, Brendan Arthur.
Secondary Blooming and Mottling in an Intravaginal Drug Release Product
.
Degree: 2006, University of Waikato
URL: http://hdl.handle.net/10289/2331
► This study was undertaken to determine the root cause of secondary blooming (surface progesterone) and mottling (translucent regions) in the CIDR insert. A stability study…
(more)
▼ This study was undertaken to determine the root cause of secondary blooming (surface progesterone) and mottling (translucent regions) in the CIDR insert.
A stability study on CIDR inserts found that the alternative supplier silicone (Dow Corning silicone is used in normal manufacture) did not exhibit either secondary blooming or mottling, in agreement with previous work. There was no difference in ‘in vitro’ drug release rate between CIDR inserts made from the two silicone feedstocks. This silicone was found to have a higher ratio of low molecular weight cyclic silicone compounds to straight chain silicone compounds (Measured through detected ion ratios in the leachate by ESMS). The exact relationship between blooming and secondary mottling and this discovery remains unknown.
Results from this research found that part B of the Dow Corning silicone was not responsible for causing secondary blooming and mottling in contrast to previous research. ESMS and GCMS results found that the Dow Corning part B had a more complex composition than of the samples from Dow Corning part A and alternative supplier silicone part A and part B.
It was found that addition of a silicone crosslinker into the Dow Corning silicone, increased mottling, but not secondary blooming. Increasing the mixing of progesterone and liquid silicone decreased mottling (via a static mixer), but did not increase surface progesterone.
The results from two studies into the packing of CIDR inserts immediately after manufacture were contradictory as one found a decrease in mottling from packing in line, while the other found no change in mottling. However there was no difference observed in surface progesterone levels between the packing conditions. Studies on the length of cure were also found to have no predictable effect on mottling.
Studies on arresting the cooling cured silicone above, between and below the melting points of the α and β progesterone polymorphs found that pausing cooling after cure at ~135 °C resulted in decreased secondary blooming and mottling, and that pausing after cure at ~125 °C exhibited less secondary blooming. Neither DSC nor XRD was able to determine a polymorphic bias in progesterone cooled by this cooling process (β progesterone polymorph was in all but one case (that had an added reduction in normal cooling rate)). Studies (XRD and DSC) on the cooling rate of progesterone found that only with very slow cooling rates was the α progesterone polymorph formed. XRD studies also revealed that the mottled regions of CIDR inserts exhibit the β progesterone polymorph, whereas the α progesterone polymorph was detected in non-mottled regions. The mottled regions were found to continue to exhibit the same polymorph after removal of surface progesterone, whereas the non-mottled regions gave no detectable XRD peak intensity.
The study found useful information to assist in the determination of the root cause of secondary blooming and mottling in CIDR inserts. However the root cause remains unknown.
Subjects/Keywords: progesterone;
silicone;
polydimethylsiloxane;
CIDR;
blooming;
mottling
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APA (6th Edition):
Waugh, B. A. (2006). Secondary Blooming and Mottling in an Intravaginal Drug Release Product
. (Masters Thesis). University of Waikato. Retrieved from http://hdl.handle.net/10289/2331
Chicago Manual of Style (16th Edition):
Waugh, Brendan Arthur. “Secondary Blooming and Mottling in an Intravaginal Drug Release Product
.” 2006. Masters Thesis, University of Waikato. Accessed January 22, 2021.
http://hdl.handle.net/10289/2331.
MLA Handbook (7th Edition):
Waugh, Brendan Arthur. “Secondary Blooming and Mottling in an Intravaginal Drug Release Product
.” 2006. Web. 22 Jan 2021.
Vancouver:
Waugh BA. Secondary Blooming and Mottling in an Intravaginal Drug Release Product
. [Internet] [Masters thesis]. University of Waikato; 2006. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10289/2331.
Council of Science Editors:
Waugh BA. Secondary Blooming and Mottling in an Intravaginal Drug Release Product
. [Masters Thesis]. University of Waikato; 2006. Available from: http://hdl.handle.net/10289/2331
Virginia Tech
14.
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 (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 January 22, 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. 22 Jan 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 Jan 22].
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
15.
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 ·
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Export
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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 January 22, 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. 22 Jan 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 Jan 22].
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/ ;
16.
Biehl, Marcos Vinicius.
Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização.
Degree: PhD, Nutrição e Produção Animal, 2012, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/10/10135/tde-23072013-110652/
;
► Três experimentos foram desenvolvidos para avaliar protocolos hormonais de sincronização de estro e ovulação em fêmeas Nelore, extratificadas nas três principais categorias de fêmeas (vacas…
(more)
▼ Três experimentos foram desenvolvidos para avaliar protocolos hormonais de sincronização de estro e ovulação em fêmeas Nelore, extratificadas nas três principais categorias de fêmeas (vacas secas, novilhas e vacas paridas) comumente encontradas nas propriedades. Os experimentos possuíam objetivos de comparar a performance reprodutiva das categorias supra citadas, sobre a taxa de detecção do estro, taxa de prenhez na IA (exp. I e II) e/ou IATF (exp III) e no repasse, de fêmeas submetidas a protocolos de sincronização do estro e ovulação. EXP I: Foram utilizadas vacas Nelore não lactantes (n=286), blocadas em um esquema fatorial 2x3, e receberam no D0 o
CIDR e 2mg de benzoato de estradiol (BE). O
CIDR permaneceu por 5 dias (D5) ou 7 dias (D7), no dia da remoção do
CIDR, as vacas receberam PGF2α (12,5mg, 25mg ou 50mg), formando os tratamentos: 5d12,5mg, 5d25mg, 5d50mg, 7d12,5mg, 7d25mg e 7d50mg. O estro foi detectado em 83.2% (238/286) das vacas, onde D7 (88,0%) foi superior (P<0,05) ao D5 (78,7%). Não houve diferença no tempo médio para detecção do estro que foi de 70,1 ±17,2 h. A taxa de concepção não diferiu entre os tratamentos. A taxa de prenhez à IA foi maior (P<0,05) para o D7 (54,2%) quando comparado ao D5 (39,6%). A taxa de prenhez no repasse e na prenhez total não diferiram entre os tratamentos. EXP II: Utilizou-se 407 novilhas Nelore pré-puberes, blocadas em um esquema fatorial 4x2, as novilhas receberam no D0 o
CIDR e 2 mg de BE, o
CIDR permaneceu por 5, 7, 9 ou 11 dias. No dia da remoção do
CIDR, as novilhas receberam 25mg de PGF2α e 300 UI eCG. Além disso metade das novilhas receberam 1 mg de BE 48 horas após a retirada do
CIDR. A detecção do estro foi maior (P<0,05) para as novilhas que receberam BE (87,3%) quando comparado aos s/BE (54,6%). O tempo médio para detecção do estro foi de 68,1 ±17,3 h. A taxa de concepção não foi influênciada pelos tratamentos, porém a taxa de prenhez da inseminação da sincronização foi maior para o grupo BE (18,8%) quando comparado ao s/BE (12,4%). A taxa de prenhez final não diferiu entre os tratamentos e foi de 62,3%. EXP III: Foram utilizadas vacas Nelore lactantes (n=191), divididas em dois tratamentos: 1xPGF-5d (as vacas permaneceram com o
CIDR por 7 dias, sendo que 25mg de PGF2α foi aplicada no D5); 2xPGF-0/7d (as vacas permaneceram com o
CIDR por 7 dias, sendo realizadas duas aplicações de 12,5mg de PGF2α, no D0 e D7). O
CIDR foi retirado no D7, e aplicou-se 0,3 ml de ECP e 300 UI de eCG. Após 50 horas todas as vacas foram submetidas à IATF. No momento da inserção do
CIDR 24% das vacas estavam ciclícas. O estro foi detectado em 54,45% (104/191) das vacas, sendo similar entre os tratamentos. O tempo médio para detecção do estro foi de 36,4 ± 8,7 h. Não houve diferença na concepção à IATF, que foi de 59,5 e 59,6% para os tratamentos 1xPGF-5d e 2xPGF- 0/7d, respectivamente. A taxa de prenhez ao final da estação de monta não diferiu e foi de 82,9% para 1xPGF-5d e 86,6% para 2xPGF-0/7d. Em todos os experimentos foi realizada a detecção do estro, com…
Advisors/Committee Members: Pires, Alexandre Vaz.
Subjects/Keywords: AI; CIDR; Cows; Heifers; IA; IATF; Nellore; Nelore; Novilhas; Prostaglandin; Prostaglandina; Puberdade; Puberty; Sincronização; Synchronization; TAI; Vacas
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APA ·
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MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Biehl, M. V. (2012). Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10135/tde-23072013-110652/ ;
Chicago Manual of Style (16th Edition):
Biehl, Marcos Vinicius. “Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização.” 2012. Doctoral Dissertation, University of São Paulo. Accessed January 22, 2021.
http://www.teses.usp.br/teses/disponiveis/10/10135/tde-23072013-110652/ ;.
MLA Handbook (7th Edition):
Biehl, Marcos Vinicius. “Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização.” 2012. Web. 22 Jan 2021.
Vancouver:
Biehl MV. Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2021 Jan 22].
Available from: http://www.teses.usp.br/teses/disponiveis/10/10135/tde-23072013-110652/ ;.
Council of Science Editors:
Biehl MV. Avaliação de estratégias para aumentar a fertilidade de fêmeas nelore submetidas a protocolos de sincronização. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/10/10135/tde-23072013-110652/ ;
Texas A&M University
17.
Zuluaga Velez, Juan Federico.
Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle.
Degree: MS, Physiology of Reproduction, 2007, Texas A&M University
URL: http://hdl.handle.net/1969.1/4812
► Objectives were to: 1) Evaluate the effectiveness of presynchronization with GnRH before the COâÂÂSynch + CIDR protocol with timed AI (TAI) at 66 h in…
(more)
▼ Objectives were to: 1) Evaluate the effectiveness of presynchronization with GnRH before the COâÂÂSynch +
CIDR protocol with timed AI (TAI) at 66 h in Bos indicusâÂÂinfluenced cattle; 2) Characterize ovarian events associated with the presynchronization; 3) Evaluate the efficacy of measuring vaginal electrical resistance (VER) to assess follicular maturity at TAI; and 4) Compare serum concentrations of progesterone (P4) in ovariectomized cows bearing new or previously used
CIDR devices with or without autoclaving. In Exp. 1 and 2, cattle received either GnRH or saline on day âÂÂ7. The COâÂÂSynch +
CIDR protocol included a
CIDR insert and GnRH (GnRHâÂÂ1; day 0), removal of
CIDR and PGF2ñ on day 7, and GnRH (GnRHâÂÂ2) and TAI 66 h after
CIDR removal. In Exp. 1, pregnancy rate of females with BCS âÂÂ¥ 5 tended to differ (P=0.085) between Presynch (38%) and COâÂÂSynch +
CIDR (54%). In Exp. 2, ovulatory response to GnRHâÂÂ1 was greater (P<0.01) in the Presynchronization (58%) than in the COâÂÂSynch +
CIDR (27.1%) group. Emergence of a follicular wave after GnRHâÂÂ1 and ovulation rate after GnRHâÂÂ2 did not differ between groups. More (P<0.01) females that developed a follicular wave after GnRHâÂÂ1 ovulated (82%) after GnRHâÂÂ2, compared to those that did not (29%). Mean VER (ohms) was greatest (101.4ñ0.8) on day 0 and declined (P<0.01) to 95.2ñ0.8 and 82ñ0.8, respectively, on days 7 and 10. We observed a low negative but significant relationship (r=0.38; P<0.001) between VER and follicular size on day 0, 7, and 10. VER difference (day 10 minus day 7) did not differ between females with small and large follicles at TAI. Mean concentrations of P4 during the 7âÂÂday insertion period were greater (P<0.03) for new (3.7 ng/ml) and reâÂÂused autoclaved (3.4 ng/ml) than for reâÂÂused disinfected CIDRs (2.8 ng/ml). In summary, Presynch improved ovulation rate after GnRHâÂÂ1, but did not improve pregnancy rates compared to COâÂÂSynch +
CIDR. Follicular maturity estimation was not feasible using VER as applied in this study. Autoclaving may be the best option when reâÂÂusing
CIDR inserts because it creates greater concentrations of P4 during the first 48 h.
Advisors/Committee Members: Williams, Gary L. (advisor), Brinsko, Steven P. (committee member), Welsh, Thomas H. (committee member).
Subjects/Keywords: Timed AI; Synchronization; Vaginal Electrical Resistance; Bos indicus; CIDR
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Record Details
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zuluaga Velez, J. F. (2007). Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/4812
Chicago Manual of Style (16th Edition):
Zuluaga Velez, Juan Federico. “Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle.” 2007. Masters Thesis, Texas A&M University. Accessed January 22, 2021.
http://hdl.handle.net/1969.1/4812.
MLA Handbook (7th Edition):
Zuluaga Velez, Juan Federico. “Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle.” 2007. Web. 22 Jan 2021.
Vancouver:
Zuluaga Velez JF. Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle. [Internet] [Masters thesis]. Texas A&M University; 2007. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/1969.1/4812.
Council of Science Editors:
Zuluaga Velez JF. Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle. [Masters Thesis]. Texas A&M University; 2007. Available from: http://hdl.handle.net/1969.1/4812
Virginia Tech
18.
Purcell, Scott Hudson.
Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle.
Degree: MS, Animal and Poultry Sciences, 2004, Virginia Tech
URL: http://hdl.handle.net/10919/9992
► The objectives of this study were to evaluate the effects of flunixin meglumine (FM), an inhibitor of PGF2a synthesis, administered at the time of embryo…
(more)
▼ The objectives of this study were to evaluate the effects of flunixin meglumine (FM), an inhibitor of PGF2a synthesis, administered at the time of embryo transfer (ET) and insertion of an intravaginal progesterone-releasing device (
CIDR) at the time of ET on pregnancy rates (PR) and the resynchronization of estrus. Beef cows (n = 796) and heifers (n = 108) at three locations were assigned randomly within age to one of four groups in a 2 x 2 factorial arrangement of treatments with injection of FM (500 mg i.m.; Phoenix Scientific, St. Joseph, MO) 2 to 12 min prior to ET and insertion of a
CIDR (1.38 g progesterone; Pfizer, New York, NY) for 13 d immediately following ET as main effects. Fresh or frozen embryos (Stage = 4 or 5; Grade = 1 or 2) were randomly assigned to be transferred to recipients on d 6 to 9 of the estrous cycle. At Location 2 a subset of fresh embryos were split and transferred as fresh half embryos (n = 192). Recipients at Location 2 only (n = 493) were observed for signs of return to estrus beginning 9 d after ET. Recipients that returned to estrus at Location 2 were either bred by AI 12 h after estrus or received an embryo 7 d after estrus. Pregnancy was diagnosed by ultrasonography. Pregnancy rates were analyzed using the LOGISTIC procedure of SAS. Pregnancy rates of split embryo recipients were analyzed separately using the same statistical procedure. Variation in the timing of the return to estrus was determined by an F-test for heterogeneity of variances. Following the initial ET, pregnancy rates of recipients receiving whole embryos were not affected by
CIDR administration (P > 0.05; 65% with
CIDR, 70% without
CIDR), however, there was a significant FM x location interaction on PR (Location 1, 89 vs. 57%; Location 2, 69 vs. 64%; Location 3, 64 vs. 67% for FM vs. no FM, respectively). There was a significant
CIDR x FM interaction on PR of recipients receiving split embryos. Pregnancy rates of split embryo recipients receiving
CIDR treatment (54%) or FM treatment alone (41%) were less than controls (64%). However, recipients receiving both
CIDR and FM had PR similar to controls (60%). The timing of the return to estrus was more synchronous (P < 0.01) for recipients fitted with a
CIDR, but PR of recipients bred following a return to estrus did not differ in cows receiving or not receiving a
CIDR (P > 0.13; 68 and 62%, respectively). Effects of FM on PR were location dependent and
CIDR insertion at ET improved synchrony of the return to estrus.
Advisors/Committee Members: Beal, Wilfred E. (committeechair), Hall, John B. (committee member), McCann, Mark A. (committee member), Smith, S. Raymond (committee member).
Subjects/Keywords: Beef Cattle; Flunixin Meglumine; Embryo Transfer; CIDR
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APA (6th Edition):
Purcell, S. H. (2004). Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/9992
Chicago Manual of Style (16th Edition):
Purcell, Scott Hudson. “Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle.” 2004. Masters Thesis, Virginia Tech. Accessed January 22, 2021.
http://hdl.handle.net/10919/9992.
MLA Handbook (7th Edition):
Purcell, Scott Hudson. “Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle.” 2004. Web. 22 Jan 2021.
Vancouver:
Purcell SH. Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle. [Internet] [Masters thesis]. Virginia Tech; 2004. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/10919/9992.
Council of Science Editors:
Purcell SH. Effect Of A Cidr Insert And Flunixin Meglumine Administered At The Time Of Embryo Transfer On Pregnancy Rate And Resynchronization Of Estrus In Beef Cattle. [Masters Thesis]. Virginia Tech; 2004. Available from: http://hdl.handle.net/10919/9992
Angelo State University
19.
Hughes, Kaitlyn.
Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers.
Degree: Masters of Science, Animal Science, 2016, Angelo State University
URL: http://hdl.handle.net/2346.1/30563
► Angus heifers born in the spring of 2014 (n=38) were used to evaluate the effects of compensatory gain on the pregnancy status using a 7-day…
(more)
▼ Angus heifers born in the spring of 2014 (n=38) were used to evaluate the effects of compensatory gain on the pregnancy status using a 7-day Co-Sync+CIDR® estrous synchronization protocol followed by a fixed-timed artificial insemination (FTAI) procedure. The heifers that were kept at the Management Instruction and Research Center (MIR group) were managed to a limited level of nutrient availability and experienced limited growth rate after weaning. Then the MIR group was placed in feeding pens to obtain an accelerated rate of gain to capture the compensatory gain phenomenon. Heifers concurrently managed at a collaborator herd in Fredericksburg (FRED group) were allowed access to oat forage, self-limiting supplementation, and free choice sorghum hay through the entirety of the project to suffice nutrient demands, not limiting growth rate. It was observed that even though differences in growth rate were significant, there was no difference in the pregnancy status from the FTAI.
Advisors/Committee Members: Runyan, Chase A (advisor), Scott, Cody B (advisor), Salisbury, Micheal W (advisor), Muelsch, Elisabeth-Christine (advisor).
Subjects/Keywords: Angus heifers; Compensatory gain; 7-day Co-Sync+CIDR; Estrous synchronization; Fixed-timed artificial insemination; nutrition; Heifer management protocols; Beef cow longevity; Reproduction
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APA (6th Edition):
Hughes, K. (2016). Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers. (Masters Thesis). Angelo State University. Retrieved from http://hdl.handle.net/2346.1/30563
Chicago Manual of Style (16th Edition):
Hughes, Kaitlyn. “Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers.” 2016. Masters Thesis, Angelo State University. Accessed January 22, 2021.
http://hdl.handle.net/2346.1/30563.
MLA Handbook (7th Edition):
Hughes, Kaitlyn. “Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers.” 2016. Web. 22 Jan 2021.
Vancouver:
Hughes K. Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers. [Internet] [Masters thesis]. Angelo State University; 2016. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2346.1/30563.
Council of Science Editors:
Hughes K. Effects of Compensatory Gain on Success of a 7-day Co-Sync+CIDR Artificial Insemination Protocol in Beef Heifers. [Masters Thesis]. Angelo State University; 2016. Available from: http://hdl.handle.net/2346.1/30563
20.
Harl, Audra Whitney.
Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season.
Degree: MS, Department of Animal Science
and Industry, 2014, Kansas State University
URL: http://hdl.handle.net/2097/18288
► Controlling reproductive cycles during active cyclicity and seasonal anestrous in small ruminants is critical for profitability. The objective of this study was to evaluate the…
(more)
▼ Controlling reproductive cycles during active
cyclicity and seasonal anestrous in small ruminants is critical for
profitability. The objective of this study was to evaluate the
effect on estrous response and interval to estrus of two
CIDR
protocols in sheep and goats during breeding and non-breeding
seasons. In experiment 1, 133 ewes were randomly assigned to 1 of 3
treatments during the breeding season. In the
CIDR-7 group, ewes
received a
CIDR insert for 7 d. In the
CIDR-7 + PGF treatment, ewes
received a
CIDR insert for 7 d and 20 mg of
prostaglandin-F[subscript]2[subscript]α
(PGF[subscript]2[subscript]α) upon
CIDR removal. Ewes in the
CIDR-14 treatment received a
CIDR insert for 14 d. Following
CIDR
removal all ewes were exposed to a ram every 12 h until breeding.
There was a shorter interval from
CIDR removal to estrus in the
CIDR-14 treatment compared to the
CIDR-7 and
CIDR-7 + PGF
treatments (P<0.05). There was no difference in number of ewes
per treatment displaying estrus. In experiment 2, 54 ewes were
randomly assigned to one of two treatment groups during the
anestrous season. Ewes in
CIDR-7 and
CIDR-14 treatments received a
CIDR insert for 7 d and 14 d, respectively. Upon
CIDR removal ewes
were exposed to a ram every 12 h until breeding. There was a
significantly shorter interval from
CIDR removal to estrus in
CIDR-14 ewes when compared with
CIDR-7 ewes (P<0.05). For
experiment 3, 37 Boer does were randomly assigned to one of two
treatments. In the
CIDR-10 treatment, does received a
CIDR insert
for 10 d and 20 mg of PGF[subscript]2[subscript]α at time of
CIDR
removal. In the
CIDR-19 treatment, does received a
CIDR insert for
19 d. Upon
CIDR removal, does were exposed to a buck fitted with a
marking harness and chalk marks were recorded every 12 h. The
number of does displaying estrus was not different (
CIDR-7, 85%;
CIDR-14, 95%). There was no difference in interval from
CIDR
removal to estrus between treatments. Results from experiments 1
and 2 supported the hypothesis that long-term protocols yield a
shorter interval to estrus when compared with short-term
protocols.
Advisors/Committee Members: David M. Grieger.
Subjects/Keywords: estrous
synchronization;
CIDR;
anestrous;
doe;
ewe; Animal Sciences (0475)
…CIDR) devices for sheep in the U.S. (FDA, 2009). The CIDR device is made from… …ease of
availability, the CIDR has become the gold standard for progesterone delivery in… …Administration of PGF2α after removal of a CIDR mimics the
secretion of PGF2α by the uterus, causing… …Utilizing CIDR Inserts
Research protocols for CIDR inserts have been focused on short-term (5… …protocol (Vilariño et al., 2011). The labelrecommended protocol for CIDR insert in ewes…
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Manager
APA (6th Edition):
Harl, A. W. (2014). Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/18288
Chicago Manual of Style (16th Edition):
Harl, Audra Whitney. “Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season.” 2014. Masters Thesis, Kansas State University. Accessed January 22, 2021.
http://hdl.handle.net/2097/18288.
MLA Handbook (7th Edition):
Harl, Audra Whitney. “Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season.” 2014. Web. 22 Jan 2021.
Vancouver:
Harl AW. Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season. [Internet] [Masters thesis]. Kansas State University; 2014. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2097/18288.
Council of Science Editors:
Harl AW. Comparison of
short-term vs. long-term estrous synchronization protocols using
CIDR devices in sheep and goats during and outside the natural
breeding season. [Masters Thesis]. Kansas State University; 2014. Available from: http://hdl.handle.net/2097/18288
University of Georgia
21.
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 January 22, 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. 22 Jan 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 Jan 22].
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
22.
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
…a controlled
internal drug-releasing device known as a CIDR (Santos-Neto et al., 2015… …Biehl et al.,
2017). The sheep CIDR approved by the US Food and Drug Administation (… …progesterone delivery devices (FGA or
MAP pessaries; CIDR) used in conjunction with PGF2α… …were synchronized with a CIDR (containing P4) or a CIDR plus PG600®, the pregnancy… …rates were not different (CIDR only group 71.9% pregnancy rate
versus 69.7% pregnancy…
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Export
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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 January 22, 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. 22 Jan 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 Jan 22].
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
University of Florida
23.
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 ·
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Export
to Zotero / EndNote / Reference
Manager
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 January 22, 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. 22 Jan 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 Jan 22].
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
Kansas State University
24.
Martel, Cynthia Ann.
Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows.
Degree: MS, Department of Animal Sciences and
Industry, 2008, Kansas State University
URL: http://hdl.handle.net/2097/872
► Lactating dairy cows from 2 Kansas farms were used to determine the effectiveness of exogenous progesterone in the form of an intravaginal insert (controlled internal…
(more)
▼ Lactating dairy cows from 2 Kansas farms were used to
determine the effectiveness of
exogenous progesterone in the form
of an intravaginal insert (controlled internal drug release;
CIDR)
in conjunction with an ovulation-synchronization protocol. Cows
were enrolled in a
Presynch + Ovsynch protocol after parturition,
where they received 2 injections of PGF[subscript]2[alpha], 14 d
apart (Presynch) beginning between 30 and 36 DIM. Cows (n = 155)
detected in estrus after the
second PGF[subscript]2[alpha]
injection of Presynch were inseminated (early AI). Remaining cows
were
assigned randomly to be treated with the Cosynch-72 protocol
(GnRH 12 d after last Presynch
PGF[subscript]2[alpha] injection,
PGF[subscript]2[alpha] 7 d after GnRH, and timed AI + GnRH
injection 72 h later) and served as
controls (n = 159), or to be
treated with the Cosynch-72 protocol and receive a progesterone
insert (Ovsynch +
CIDR; n = 175) for 7 d between GnRH and
PGF[subscript]2[alpha]. Blood was collected at d
−22 and −10
(relative to TAI at d 0) to determine cycling status based on
progesterone
concentrations and again at d 11 post AI to determine
luteal competency. Treated cows were
assigned body condition
scores (BCS) on d −22 and −10. Pregnancy status was confirmed by
palpation of the uterus per rectum and its contents on d 38
post-timed AI and verified again 4 wk
later. Treatment with the
progesterone insert increased timed AI pregnancies per AI in
Cosynch-
72 +
CIDR-treated cows when compared with controls (38
vs. 24%), but did not differ from
early AI cows (38%). Pregnancy
loss was numerically less in progesterone-treated cows than in
controls (4.4 vs. 11.8%). Our study shows that increased
pregnancies per AI can be achieved by
the use of a progesterone
insert in a reduced population of cows not yet inseminated, but
treated
with a progesterone insert.
Advisors/Committee Members: Jeffrey S. Stevenson.
Subjects/Keywords: Lactating
Dairy cows;
CIDR; Progesterone
insert; Ovulation
synchronization;
Ovsynch;
Presynch-Ovsynch; Agriculture, General (0473)
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Martel, C. A. (2008). Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/872
Chicago Manual of Style (16th Edition):
Martel, Cynthia Ann. “Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows.” 2008. Masters Thesis, Kansas State University. Accessed January 22, 2021.
http://hdl.handle.net/2097/872.
MLA Handbook (7th Edition):
Martel, Cynthia Ann. “Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows.” 2008. Web. 22 Jan 2021.
Vancouver:
Martel CA. Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows. [Internet] [Masters thesis]. Kansas State University; 2008. [cited 2021 Jan 22].
Available from: http://hdl.handle.net/2097/872.
Council of Science Editors:
Martel CA. Fertility after
timed artific[i]al insemination in response to a Controlled
Internal Drug Release (CIDR) insert in lactating dairy
cows. [Masters Thesis]. Kansas State University; 2008. Available from: http://hdl.handle.net/2097/872
25.
Abreu, Fernanda Martins de.
The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility.
Degree: PhD, Veterinary Clinical Sciences, 2015, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191
► Synchronization programs aim to effectively create an ideal hormonal environment to successfully induce the development of a dominant follicle containing a healthy oocyte that is…
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▼ Synchronization programs aim to effectively create an
ideal hormonal environment to successfully induce the development
of a dominant follicle containing a healthy oocyte that is capable
of being fertilized and developing to term. It has been repeatedly
suggested that greater gonadotropin stimulation for a finite period
during follicular development may enhance fertility in beef cattle.
It was hypothesized that decreased progesterone (P4) concentrations
during early follicular development would result in increased
luteinizing hormone (LH) pulse frequency, leading to oocytes of
greater developmental capacity, ultimately increasing pregnancy
rate to AI in beef cattle. In the first experiment, decreased P4
concentration during early follicular development and its effect on
pregnancy rate to timed-AI and estrus-AI were investigated in
multiparous beef cows in Ohio (Experiment 1.1) and Montana
(Experiment 1.2). In both experiments, P4 concentrations at the end
of P4 treatment were, as designed, greater in the high P4 (HiP4)
than the low P4 (LoP4) treatment. The administration of
prostaglandin F2a (PGF) to induce luteolysis prior to emergence of
the new follicular wave, in conjunction with either insertion
(Experiment 1.1) or maintenance (Experiment 1.2) of a previously
used
CIDR, resulted in decreased P4 concentrations during emergence
and early development of the ovulatory follicle in the LoP4
treatment. It was demonstrated that decreased P4 concentrations
during follicular development resulted in greater estradiol (E2)
concentrations and increased follicle diameter at termination of P4
treatment (Experiment 1.1), but did not influence pregnancy rates
attained at the subsequent synchronized ovulation/estrus in beef
cows (Experiments 1.1 and 1.2).In the second experiment, the effect
of P4 concentrations during early follicular development on LH
secretion and characteristics of oocytes that reflect developmental
competence were investigated in primiparous beef cattle. The animal
model used was similar to Experiment 1.1. Concentrations of P4 were
lesser and E2 were greater in the LoP4 than HiP4 treatment
throughout follicular development. LH pulse frequency was greater
in the LoP4 than HiP4 treatment, however, LH mean concentration and
pulse amplitude did not differ between treatments. Among
treatments, follicles aspirated per cow, total oocytes recovered
per cow, recovery rate, percentage of oocytes graded 1 to 3, oocyte
diameter, percentage of oocyte stained for BCB (BCB+), and the
relative expression of oocyte mRNA for FST did not differ. In
conclusion, decreased P4 concentrations during early follicular
development increased LH pulse frequency and enhanced E2
concentrations in both early antral and dominant follicles.
However, the parameters used to investigate developmental
competence in oocytes in the current experiment did not differ
between HiP4 and LoP4 treatments. In addition, differences in P4
concentrations do not impact pregnancy rates in beef cows, when
adequate intervals of proestrus are afforded.
Advisors/Committee Members: Day, Michael (Advisor).
Subjects/Keywords: Animal Sciences; Endocrinology; Physiology; Progesterone, Used CIDR, Fertility, Beef Cows, LH, Oocyte
Developmental Capacity
…beginning of the 5-d CO-Synch + CIDR protocol in beef heifers. J. Anim. Sci.
92: 4198-4203.
2… …pregnancy rate to TAI in beef heifers submitted to the 5-d COSynch + CIDR program. J. Anim. Sci… …Synch +
CIDR program on timed AI pregnancy rate in beef heifers. J. Anim. Sci. 91 (ESuppl… …GnRH at
the onset of the 5-d Select Synch + CIDR program in beef heifers. J. Anim. Sci.
90… …different GnRH
treatments in an 11-d CIDR timed AI synchronization program in Santa Inês
ewes"…
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APA (6th Edition):
Abreu, F. M. d. (2015). The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191
Chicago Manual of Style (16th Edition):
Abreu, Fernanda Martins de. “The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility.” 2015. Doctoral Dissertation, The Ohio State University. Accessed January 22, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191.
MLA Handbook (7th Edition):
Abreu, Fernanda Martins de. “The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility.” 2015. Web. 22 Jan 2021.
Vancouver:
Abreu FMd. The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility. [Internet] [Doctoral dissertation]. The Ohio State University; 2015. [cited 2021 Jan 22].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191.
Council of Science Editors:
Abreu FMd. The Effect of Progesterone Concentrations during Follicular
Development in Cattle on Luteinizing Hormone Secretion, Follicular
Development, Oocyte Competence and Fertility. [Doctoral Dissertation]. The Ohio State University; 2015. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191
. 
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