Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos

La sincronización de celo en bovinos es una herramienta que favorece a los diferentes productores con el fin de aumentar la eficiencia reproductiva y así mismo su rentabilidad del hato tanto en ganaderías productoras de leche como de carne y el doble propósito, con las diferentes alternativas que bu...

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Autores:: Guevara Garcia, Carlos Alberto
Buitrago Toro, Diego Fernando

Tipo de recurso:: Trabajo de grado de pregrado

Fecha de publicación:: 2021

Institución:: Universidad Cooperativa de Colombia

Repositorio:: Repositorio UCC

Idioma:

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network_acronym_str	COOPER2
network_name_str	Repositorio UCC
repository_id_str
dc.title.spa.fl_str_mv	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
title	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
spellingShingle	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos Inseminación Biotecnología Bovino Estro Hormonas TG 2021 MVZ 33692 Insemination Biotechnology Bovine Estrus Hormones
title_short	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
title_full	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
title_fullStr	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
title_full_unstemmed	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
title_sort	Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos
dc.creator.fl_str_mv	Guevara Garcia, Carlos Alberto Buitrago Toro, Diego Fernando
dc.contributor.advisor.none.fl_str_mv	Bonilla León, Lilian
dc.contributor.author.none.fl_str_mv	Guevara Garcia, Carlos Alberto Buitrago Toro, Diego Fernando
dc.subject.spa.fl_str_mv	Inseminación Biotecnología Bovino Estro Hormonas
topic	Inseminación Biotecnología Bovino Estro Hormonas TG 2021 MVZ 33692 Insemination Biotechnology Bovine Estrus Hormones
dc.subject.classification.spa.fl_str_mv	TG 2021 MVZ 33692
dc.subject.other.spa.fl_str_mv	Insemination Biotechnology Bovine Estrus Hormones
description	La sincronización de celo en bovinos es una herramienta que favorece a los diferentes productores con el fin de aumentar la eficiencia reproductiva y así mismo su rentabilidad del hato tanto en ganaderías productoras de leche como de carne y el doble propósito, con las diferentes alternativas que buscan favorecer y aumentar la rentabilidad disminuyendo el intervalo de partos y así mismo obteniendo genética de gran calidad para así destacar lo mejor en su descendencia. El uso de hormonas exógenas (progesterona, prostaglandina F2α, hormona liberadora de gonadotropinas, gonadotropina coriónica equina, estrógenos, entre otras) nos favorece a tener un control del ciclo estral, para así realizar la inseminación a tiempo fijo (IATF) en un momento esperado. Hoy en día estos protocolos han avanzado con las nuevas investigaciones y estudios los cuales nos favorecen ya que nos permite conjugar las diferentes hormonas para así obtener una alta eficiencia en el momento de realizar la inseminación (IA). En el mercado se encuentran diferentes protocolos los cuales consisten en protocolos a base de prostaglandina y progesterona, y otros más complejos como lo son los protocolos Ov-Synch, Co-Synch (5 y 7) Pre-Synch y J-Synch con o sin modificaciones. Todos estos protocolos son de gran importancia para las diferentes ganaderías tanto como de carne como de leche y el doble propósito, los diferentes protocolos generando un impacto favorable en la biotecnología reproductiva ya que brinda un gran potencial para el mejoramiento genético y la diminución de intervalo entre partos.
publishDate	2021
dc.date.accessioned.none.fl_str_mv	2021-03-23T17:01:40Z
dc.date.available.none.fl_str_mv	2021-03-23T17:01:40Z
dc.date.issued.none.fl_str_mv	2021-03-23
dc.type.none.fl_str_mv	Trabajo de grado - Pregrado
dc.type.coar.none.fl_str_mv	http://purl.org/coar/resource_type/c_7a1f
dc.type.driver.none.fl_str_mv	info:eu-repo/semantics/bachelorThesis
dc.type.version.none.fl_str_mv	info:eu-repo/semantics/acceptedVersion
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dc.identifier.uri.none.fl_str_mv	https://hdl.handle.net/20.500.12494/33692
dc.identifier.bibliographicCitation.spa.fl_str_mv	Guevara García, C. A. y Buitrago Toro, D. F. (2021). Actualización en los protocolos de inseminación artificial a tiempo fijo (iatf) en bovinos. [tesis de pregrado, Universidad Cooperativa de Colombia]. Repositorio Institucional UCC. http://hdl.handle.net/20.500.12494/33692
url	https://hdl.handle.net/20.500.12494/33692
identifier_str_mv	Guevara García, C. A. y Buitrago Toro, D. F. (2021). Actualización en los protocolos de inseminación artificial a tiempo fijo (iatf) en bovinos. [tesis de pregrado, Universidad Cooperativa de Colombia]. Repositorio Institucional UCC. http://hdl.handle.net/20.500.12494/33692
dc.relation.references.spa.fl_str_mv	Sartori R, Barros CM. Reproductive cycles in Bos indicus cattle. Anim Reprod Sci [Internet]. 2011;124(3–4):244–50. Available from: http://dx.doi.org/10.1016/j.anireprosci.2011.02.006 Raso M. Inseminación Artificial a Tiempo Fijo (I.A.T.F). INTA Esquel [Internet]. 2012;4. Available from: https://inta.gob.ar/sites/default/files/script-tmp-inta_ganaderia46_inseminacion_ovina.pdf Bó GA, Baruselli PS, Mapletoft RJ. Synchronization techniques to increase the utilization ofartificial insemination in beef and dairy cattle. Anim Reprod. 2013;10(3):137–42. Zuluaga AF, Uribe F, Valencia LM, Murgueito E, Ochoa LM. 3.-Buenas-Practicas-Ganaderas.pdf. García DB. General aspects of fixed time artificial insemination (FTAI) in Bovine. Silva Filho ML, Ferreira-Silva JC, Vieira JIT, Basto SRL, Chaves MS, Luz JB, et al. Influence of the male effect on follicular dynamics and pregnancy rate in lactating cows undergoing fixed-time artificial insemination. Livest Sci. 2020;240(May). Becaluba F. Metodos de sincronizacion de celo en bovinos. Sitio Argentino Prod Anim [Internet]. 2006;2–4. Available from: www.produccion-animal.com.ar Guáqueta H. CIClO EsTRAl: FIsIOlOgíA básICA y EsTRATEgIAs PARA MEjORAR lA dETECCIón dE CElOs EsTROus CyClE: bAsIC PHysIOlOgy And sTRATEgIEs FOR IMPROVIng EsTRus dETECTIOn. Vol. 56, Rev. Med. vet. Zoot. 2009. Maldonado Estrada J. Universidad de antioquia. 2019;(November). Yánez-avalos DO, Barbona I, Carlos J, Marini PR. P ROTOCOLS J-S YNCH WITH AND WITHOUT E CG IN B ROWN S WISS AND CROSSES WHITH B OS INDICUS COWS IN THE. 2021;33(1):8–20. Rodrigues AS, Silva MAA, Brandão TO, Nascimento AB, Bittencourt RF, Chalhoub M, et al. Efficacy of the double PGF2 alpha dose-eCG association in proestrus of crossbred dairy cows submitted to IATF. Pesqui Vet Bras. 2018;38(8):1518–27 Stevenson JS, Pulley SL. Feedback effects of estradiol and progesterone on ovulation and fertility of dairy cows after gonadotropin-releasing hormone-induced release of luteinizing hormone. J Dairy Sci [Internet]. 2016;99(4):3003–15. Available from: http://dx.doi.org/10.3168/jds.2015-10091 Garzon Gelvez jahir vicente. EFECTO DEL NÚMERO DE APLICACIONES DE PROSTAGLANDINA SOBRE LA REGRESIÓN DE CUERPOS LÚTEOS, EL RETORNO AL CELO Y LA OVULACIÓN, EN DONANTES DE EMBRIONES BOVINOS. 2016. Vinicius M, Junior CF, Pires A V, Vinicius M, Henrique M, Polizel DM, et al. Theriogenology Luteolysis in Bos indicus cows on Days 5 and 7 of estrous cycle with varying doses of PGF 2 a. Theriogenology [Internet]. 2016;86(5):1268–74. Available from: http://dx.doi.org/10.1016/j.theriogenology.2016.04.067 Carvajal AM, Martinez ME. El ciclo estral en la hembra bovina y su importancia productiva. 2020; Gordillo Aguilar J, Perales Hurtado JC. Comparación de la eficiencia de dos Protocolos De Inseminación Artificial A Término Fijo IATF Aplicado Como Parte Del Mejoramiento Reproductivo De La Finca Las Palmeras Vereda Araguaney Del Municipio De Tame, Departamento De Arauca. 2017. Sousa L, Di L, Maggitti P, Assis P, Carvalho S, Costa I, et al. Effects of equine chorionic gonadotropin administered via the Baihui acupoint on follicular ovarian dynamics and the luteal function of cattle during an ovulation synchronization treatment regimen for fixed-time artificial insemination Marcus Vinicius Gal. 2020;223(October). Motta Delgado pablo andres, Ramos Cuéllar N, Sanches G. Dinámica folicular en la vida reproductiva de la hembra bovina Follicular dynamics in the reproductive life of female livestock. 2011;5(2):88–99. Henao Restrepo G. Algunos Factores Relacionados con la Dinámica Folicular en. 2010;63(2):5577–86. Fernandez Tubino A. DINÁMICA FOLICULAR : FUNCIONAMIENTO Y. 2003;8–12. Bandai K, Kusaka H, Miura H, Kikuchi M. Theriogenology A simple and practical short-term timed arti fi cial insemination protocol using estradiol benzoate with prostaglandin F2 a in lactating dairy cows. Theriogenology [Internet]. 2020;141:197–201. Available from: https://doi.org/10.1016/j.theriogenology.2019.09.024 Dadarwal D, Mapletoft RJ, Adams GP, Pfeifer LFM, Creelman C, Singh J. Theriogenology Effect of progesterone concentration and duration of proestrus on fertility in beef cattle after fi xed-time arti fi cial insemination. Theriogenology [Internet]. 2013;79(5):859–66. Available from: http://dx.doi.org/10.1016/j.theriogenology.2013.01.003 Moraes Vasconcelos J, Colombo Pereira MH, Wiltbank MC, Guida TG, Lopes Jr FR, Sanchez Jr CP, et al. Evolution of fixed-time AI in dairy cattle in Brazil. 2018;(Irrs). Ventas JN, Carvalho JB, Crepaldi GA, Cipriano RS, Jocomini JO, Maio JR, et al. Effects of two estradiol esters ( benzoate and cypionate ) on the induction of synchronized ovulations in Bos indicus cows submitted to a timed artificial insemination protocol. THE [Internet]. 2012;78(3):510–6. Available from: http://dx.doi.org/10.1016/j.theriogenology.2012.02.031 Crepaldi GA, Ventas JN, Girotto RW, Carvalho JG, Baruselli PS. E ff ect of induction of ovulation with estradiol benzoate at P4 device removal on ovulation rate and fertility in Bos indicus cows submitted to a TAI protocol. Anim Reprod Sci [Internet]. 2019;209(March):106141. Available from: https://doi.org/10.1016/j.anireprosci.2019.106141 Baruselli PS, Sales JNS, Sala R V, Vieira LM, Filho MFS. History , evolution and perspectives of timed artificial insemination programs in Brazil. Anim Reprod. 2012;9(3):139–52. Giordano JO, Wiltbank MC, Fricke PM, Bas S, Pawlisch R, Guenther JN, et al. Theriogenology Effect of increasing GnRH and PGF 2 a dose during Double-Ovsynch on ovulatory response , luteal regression , and fertility of lactating dairy cows. Theriogenology [Internet]. 2013;80(7):773–83. Available from: http://dx.doi.org/10.1016/j.theriogenology.2013.07.003 Casanova Arias D. MEJORA DE LA EFICIENCIA REPRODUCTIVA DEL GANADO VACUNO LECHERO A TRAVÉS DEL MANEJO. 2014;1–32. Borchardt S, Haimerl P, Heuwieser W. Effect of insemination after estrous detection on pregnancy per artificial insemination and pregnancy loss in a Presynch-Ovsynch protocol : A meta-analysis. J Dairy Sci [Internet]. 2016;99(3):2248–56. Available from: http://dx.doi.org/10.3168/jds.2015-10358 Pursley j r, Mee M o, Wildbank M c. Synchronization of ovulation in dairy cows using PGF2α and GnRH. 1995;(95):915–23. Carvalho PD, Guenther JN, Fuenzalida MJ, Amundson MC, Wiltbank MC, Fricke PM. Presynchronization using a modified Ovsynch protocol or a single gonadotropin-releasing hormone injection 7 d before an Ovsynch-56 protocol for submission of lactating dairy cows to first timed artificial insemination. J Dairy Sci [Internet]. 2014;97(10):6305–15. Available from: http://dx.doi.org/10.3168/jds.2014-8222 Bello NM, Steibel JP, Pursley JR. Optimizing Ovulation to First GnRH Improved Outcomes to Each Hormonal Injection of Ovsynch in Lactating Dairy Cows. J Dairy Sci [Internet]. 2006;89(9):3413–24. Available from: http://dx.doi.org/10.3168/jds.S0022-0302(06)72378-5 Fricke PM, Giordano JO, Valenza A, Jr GL, Amundson MC, Carvalho PD. Reproductive performance of lactating dairy cows managed for first service using timed artificial insemination with or without detection of estrus using an activity-monitoring system. J Dairy Sci [Internet]. 2014;97(5):2771–81. Available from: http://dx.doi.org/10.3168/jds.2013-7366 Poock SE, Lamberson WR, Lucy MC. Theriogenology Effect of different gonadorelin ( GnRH ) products used for the fi rst or resynchronized timed arti fi cial insemination on pregnancy rates in postpartum dairy cows. Theriogenology [Internet]. 2015;84(4):504–8. Available from: http://dx.doi.org/10.1016/j.theriogenology.2015.04.002 Giordano JO, Wiltbank MC, Guenther JN, Pawlisch R, Bas S, Cunha AP, et al. Increased fertility in lactating dairy cows resynchronized with Double-Ovsynch compared with Ovsynch initiated 32 d after timed artificial insemination. J Dairy Sci [Internet]. 2012;95(2):639–53. Available from: http://dx.doi.org/10.3168/jds.2011-4418 Souza AH, Ayres H, Ferreira RM, Wiltbank MC. A new presynchronization system ( Double-Ovsynch ) increases fertility at first postpartum timed AI in lactating dairy cows. 2008;70:208–15. Obando Suarez D. Bases farmacológicas y actualización de la sincronización del celo bovino Pharmacological bases and current aspects of bovine heat synchronization. 2020. Bridges A, Lake S, Lemenager R, Claeys M. Timed Artificial Insemination in Beef Cows: What are the Options? Purdue Univ Coop Ext Serv. 2008;1–8. Oosthuizen N, Canal LB, Fontes PLP, Sanford CD, DiLorenzo N, Dahlen CR, et al. Prostaglandin F2α 7 d prior to initiation of the 7-d CO-synch + CIDR protocol failed to enhance estrus response and pregnancy rates in beef heifers. J Anim Sci. 2018;96(4):1466–73. Corpron MR, Zoca SM, Reynolds M, Carnahan K, Hall JB. Evaluating the effects of a high-concentration dose of prostaglandin F 2 α in a 5-d CO-Synch + controlled internal drug release protocol on fertility in beef cows 1. 2019;1754–7. Bó GA, Javier J, Mata D, Baruselli PS. Theriogenology Alternative programs for synchronizing and resynchronizing ovulation in beef cattle. Theriogenology [Internet]. 2016;86(1):388–96. Available from: http://dx.doi.org/10.1016/j.theriogenology.2016.04.053 De la Mata jose javier. PROLONGACIÓN DEL PROESTRO Y REDUCCION DEL PERIODO DE INSERCION DEL DISPOSITIVO CON PROGESTERONA EN VAQUILLONAS PARA CARNE INSEMINADAS A TIEMPO FIJO. 2016. Berrio Ospino J ivan. PILARES DEL ANESTRO POSTPARTO EN BOVINOS. 2018. Ayres H, Ferreira RM, Marques MO, Reis EL, Silva RCP. Equine chorionic gonadotropin and gonadotropin-releasing hormone enhance fertility in a norgestomet-based , timed artificial insemination protocol in suckled Nelore ( Bos indicus ) cows. Theriogenology [Internet]. 2010;73(5):651–8. Available from: http://dx.doi.org/10.1016/j.theriogenology.2009.11.004 De la mata jose javier, Bo G. Sincronización de celos y ovulación utilizando protocolos con benzoato de estradiol y GnRH en períodos reducidos de inserción de un dispositivo con progesterona en vaquillonas para carne *. 2012;(July 2016). Re M, De la Mata jose javier, Bo G. 8 synchronization of ovulation in dairy heifers using a shortened estradiol- based protocol that provides for a lengthened proestrus . 2013;(July 2016). Bridges GA, Mussard ML, Helser LA, Day ML. Theriogenology Comparison of follicular dynamics and hormone concentrations between the 7-day and 5-day CO-Synch þ CIDR program in primiparous beef cows. Theriogenology [Internet]. 2014;81(4):632–8. Available from: http://dx.doi.org/10.1016/j.theriogenology.2013.11.020 Geary T, Whittier J, Haldford D, Macneil MD. Calf removal improves conception rates to the Ovsynch and CO-Synch protocols The online version of this article , along with updated information and services , is located on the World Wide Web at : 2001;(February). Geary TW, Salverson RR, Whittier JC. Synchronization of ovulation using GnRH or hCG with the CO-Synch protocol in suckled beef cows. J Anim Sci. 2001;79(10):2536–41.
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spelling	Bonilla León, LilianGuevara Garcia, Carlos AlbertoBuitrago Toro, Diego Fernando2021-03-23T17:01:40Z2021-03-23T17:01:40Z2021-03-23https://hdl.handle.net/20.500.12494/33692Guevara García, C. A. y Buitrago Toro, D. F. (2021). Actualización en los protocolos de inseminación artificial a tiempo fijo (iatf) en bovinos. [tesis de pregrado, Universidad Cooperativa de Colombia]. Repositorio Institucional UCC. http://hdl.handle.net/20.500.12494/33692La sincronización de celo en bovinos es una herramienta que favorece a los diferentes productores con el fin de aumentar la eficiencia reproductiva y así mismo su rentabilidad del hato tanto en ganaderías productoras de leche como de carne y el doble propósito, con las diferentes alternativas que buscan favorecer y aumentar la rentabilidad disminuyendo el intervalo de partos y así mismo obteniendo genética de gran calidad para así destacar lo mejor en su descendencia. El uso de hormonas exógenas (progesterona, prostaglandina F2α, hormona liberadora de gonadotropinas, gonadotropina coriónica equina, estrógenos, entre otras) nos favorece a tener un control del ciclo estral, para así realizar la inseminación a tiempo fijo (IATF) en un momento esperado. Hoy en día estos protocolos han avanzado con las nuevas investigaciones y estudios los cuales nos favorecen ya que nos permite conjugar las diferentes hormonas para así obtener una alta eficiencia en el momento de realizar la inseminación (IA). En el mercado se encuentran diferentes protocolos los cuales consisten en protocolos a base de prostaglandina y progesterona, y otros más complejos como lo son los protocolos Ov-Synch, Co-Synch (5 y 7) Pre-Synch y J-Synch con o sin modificaciones. Todos estos protocolos son de gran importancia para las diferentes ganaderías tanto como de carne como de leche y el doble propósito, los diferentes protocolos generando un impacto favorable en la biotecnología reproductiva ya que brinda un gran potencial para el mejoramiento genético y la diminución de intervalo entre partos.The synchronization of heat in cattle is a tool that favors farmers to increase reproductive efficiency and their profitability of the herd both as dairy and meat producing herds and the dual purpose, with the different alternatives that seek to favor and increase the profitability reducing the calving intervals and obtaining high quality genetics to obtain the best in their offspring. The use of exogenous hormones (progesterone, prostaglandin F2α, gonadotropin-releasing hormone, equine chorionic gonadotropin, estrogens, among others) favors us to have control of the estrous cycle, to carry out insemination at a fixed time (IATF) at an expected time. Today these protocols have advanced with new research and studies which favor us since it allows us to combine the different hormones to obtain high efficiency at the time of insemination (AI). In the market there are different protocols which consist of protocols based on prostaglandin and progesterone, and others a little more complex such as the Ov-Synch, Co-Synch (5 and 7) Pre-Synch and J-Synch protocols with or without modifications. All these protocols are of great importance for the different herds both as meat and milk and the dual purpose, all these protocols generating a favorable impact on reproductive biotechnology as it has great potential for genetic improvement and the reduction of the interval between deliveries.carlosa.guevara@campusucc.edu.codiego.buitragot@campusucc.edu.co38 p.Universidad Cooperativa de Colombia, Facultad de Ciencias de la Salud, Medicina Veterinaria y Zootecna, IbagueMedicina veterinaria y zootecniaIbaguéInseminaciónBiotecnologíaBovinoEstroHormonasTG 2021 MVZ 33692InseminationBiotechnologyBovineEstrusHormonesActualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinosTrabajo de grado - Pregradohttp://purl.org/coar/resource_type/c_7a1finfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/acceptedVersionAtribucióninfo:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Sartori R, Barros CM. Reproductive cycles in Bos indicus cattle. Anim Reprod Sci [Internet]. 2011;124(3–4):244–50. Available from: http://dx.doi.org/10.1016/j.anireprosci.2011.02.006Raso M. Inseminación Artificial a Tiempo Fijo (I.A.T.F). INTA Esquel [Internet]. 2012;4. Available from: https://inta.gob.ar/sites/default/files/script-tmp-inta_ganaderia46_inseminacion_ovina.pdfBó GA, Baruselli PS, Mapletoft RJ. Synchronization techniques to increase the utilization ofartificial insemination in beef and dairy cattle. Anim Reprod. 2013;10(3):137–42.Zuluaga AF, Uribe F, Valencia LM, Murgueito E, Ochoa LM. 3.-Buenas-Practicas-Ganaderas.pdf.García DB. General aspects of fixed time artificial insemination (FTAI) in Bovine.Silva Filho ML, Ferreira-Silva JC, Vieira JIT, Basto SRL, Chaves MS, Luz JB, et al. Influence of the male effect on follicular dynamics and pregnancy rate in lactating cows undergoing fixed-time artificial insemination. Livest Sci. 2020;240(May).Becaluba F. Metodos de sincronizacion de celo en bovinos. Sitio Argentino Prod Anim [Internet]. 2006;2–4. Available from: www.produccion-animal.com.arGuáqueta H. CIClO EsTRAl: FIsIOlOgíA básICA y EsTRATEgIAs PARA MEjORAR lA dETECCIón dE CElOs EsTROus CyClE: bAsIC PHysIOlOgy And sTRATEgIEs FOR IMPROVIng EsTRus dETECTIOn. Vol. 56, Rev. Med. vet. Zoot. 2009.Maldonado Estrada J. Universidad de antioquia. 2019;(November).Yánez-avalos DO, Barbona I, Carlos J, Marini PR. P ROTOCOLS J-S YNCH WITH AND WITHOUT E CG IN B ROWN S WISS AND CROSSES WHITH B OS INDICUS COWS IN THE. 2021;33(1):8–20.Rodrigues AS, Silva MAA, Brandão TO, Nascimento AB, Bittencourt RF, Chalhoub M, et al. Efficacy of the double PGF2 alpha dose-eCG association in proestrus of crossbred dairy cows submitted to IATF. Pesqui Vet Bras. 2018;38(8):1518–27Stevenson JS, Pulley SL. Feedback effects of estradiol and progesterone on ovulation and fertility of dairy cows after gonadotropin-releasing hormone-induced release of luteinizing hormone. J Dairy Sci [Internet]. 2016;99(4):3003–15. 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Calf removal improves conception rates to the Ovsynch and CO-Synch protocols The online version of this article , along with updated information and services , is located on the World Wide Web at : 2001;(February).Geary TW, Salverson RR, Whittier JC. Synchronization of ovulation using GnRH or hCG with the CO-Synch protocol in suckled beef cows. 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Actualización en los protocolos de inseminación artificial a tiempo fijo(iatf) en bovinos

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