The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility

Autores
Bruno Galarraga, María Macarena; Cano Moreno, Virginia; Lago Cruz, Beatriz; Encinas, Teresa; Gonzalez Bulnes, Antonio; Martinez Ros, Paula
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results are controversial since fertility rates are commonly affected. The present study aims to evaluate, therefore, the adequacy of hCG in protocols for the synchronization of estrus and ovulation. Ovarian follicle dynamics, occurrence of estrus behavior and subsequent ovulation, quality of corpora lutea, and pregnancy rate after controlled natural mating were assessed in two consecutive trials. The findings indicate that the low fertility rates reported for the protocols based on the administration of hCG for inducing ovulation during estrus synchronization in sheep may be related to a high occurrence of abnormal follicular growth patterns, disturbances, and retardments of ovulation and concomitant formation of follicular cysts in the treated females. These results preclude their practical application to induce ovulation concomitantly to estrous synchronization treatments.
Estación Experimental Agropecuaria Bariloche
Fil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Laboratorio de Reproducción de Rumiantes Menores; Argentina
Fil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Cano Moreno, Virginia. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
Fil: Lago Cruz, Beatriz. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; España
Fil: Encinas, Teresa. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; España
Fil: Gonzalez Bulnes, Antonio. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
Fil: Martinez Ros, Paula. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
Fuente
Animals 11 (4) : 984 (Abril 2021)
Materia
Hormonas Sexuales
Reproducción Sexual
Ovulación
Ovulación Inducida
Oveja
Sex Hormones
Sexual Reproduction
Ovulation
Induced Ovulation
Ewes
Hormona eCG
Rumiantes Menores
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/9836
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oai_identifier_str oai:localhost:20.500.12123/9836
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network_name_str INTA Digital (INTA)
spelling The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and FertilityBruno Galarraga, María MacarenaCano Moreno, VirginiaLago Cruz, BeatrizEncinas, TeresaGonzalez Bulnes, AntonioMartinez Ros, PaulaHormonas SexualesReproducción SexualOvulaciónOvulación InducidaOvejaSex HormonesSexual ReproductionOvulationInduced OvulationEwesHormona eCGRumiantes MenoresCurrently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results are controversial since fertility rates are commonly affected. The present study aims to evaluate, therefore, the adequacy of hCG in protocols for the synchronization of estrus and ovulation. Ovarian follicle dynamics, occurrence of estrus behavior and subsequent ovulation, quality of corpora lutea, and pregnancy rate after controlled natural mating were assessed in two consecutive trials. The findings indicate that the low fertility rates reported for the protocols based on the administration of hCG for inducing ovulation during estrus synchronization in sheep may be related to a high occurrence of abnormal follicular growth patterns, disturbances, and retardments of ovulation and concomitant formation of follicular cysts in the treated females. These results preclude their practical application to induce ovulation concomitantly to estrous synchronization treatments.Estación Experimental Agropecuaria BarilocheFil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Laboratorio de Reproducción de Rumiantes Menores; ArgentinaFil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; ArgentinaFil: Cano Moreno, Virginia. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; EspañaFil: Lago Cruz, Beatriz. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; EspañaFil: Encinas, Teresa. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; EspañaFil: Gonzalez Bulnes, Antonio. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; EspañaFil: Martinez Ros, Paula. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; EspañaMDPI2021-07-19T11:44:50Z2021-07-19T11:44:50Z2021-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/9836https://www.mdpi.com/2076-2615/11/4/9842076-2615https://doi.org/10.3390/ani11040984Animals 11 (4) : 984 (Abril 2021)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-11T10:23:49Zoai:localhost:20.500.12123/9836instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-11 10:23:50.013INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
title The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
spellingShingle The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
Bruno Galarraga, María Macarena
Hormonas Sexuales
Reproducción Sexual
Ovulación
Ovulación Inducida
Oveja
Sex Hormones
Sexual Reproduction
Ovulation
Induced Ovulation
Ewes
Hormona eCG
Rumiantes Menores
title_short The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
title_full The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
title_fullStr The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
title_full_unstemmed The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
title_sort The Use of hCG for Inducing Ovulation in Sheep Estrus Synchronization Impairs Ovulatory Follicle Growth and Fertility
dc.creator.none.fl_str_mv Bruno Galarraga, María Macarena
Cano Moreno, Virginia
Lago Cruz, Beatriz
Encinas, Teresa
Gonzalez Bulnes, Antonio
Martinez Ros, Paula
author Bruno Galarraga, María Macarena
author_facet Bruno Galarraga, María Macarena
Cano Moreno, Virginia
Lago Cruz, Beatriz
Encinas, Teresa
Gonzalez Bulnes, Antonio
Martinez Ros, Paula
author_role author
author2 Cano Moreno, Virginia
Lago Cruz, Beatriz
Encinas, Teresa
Gonzalez Bulnes, Antonio
Martinez Ros, Paula
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Hormonas Sexuales
Reproducción Sexual
Ovulación
Ovulación Inducida
Oveja
Sex Hormones
Sexual Reproduction
Ovulation
Induced Ovulation
Ewes
Hormona eCG
Rumiantes Menores
topic Hormonas Sexuales
Reproducción Sexual
Ovulación
Ovulación Inducida
Oveja
Sex Hormones
Sexual Reproduction
Ovulation
Induced Ovulation
Ewes
Hormona eCG
Rumiantes Menores
dc.description.none.fl_txt_mv Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results are controversial since fertility rates are commonly affected. The present study aims to evaluate, therefore, the adequacy of hCG in protocols for the synchronization of estrus and ovulation. Ovarian follicle dynamics, occurrence of estrus behavior and subsequent ovulation, quality of corpora lutea, and pregnancy rate after controlled natural mating were assessed in two consecutive trials. The findings indicate that the low fertility rates reported for the protocols based on the administration of hCG for inducing ovulation during estrus synchronization in sheep may be related to a high occurrence of abnormal follicular growth patterns, disturbances, and retardments of ovulation and concomitant formation of follicular cysts in the treated females. These results preclude their practical application to induce ovulation concomitantly to estrous synchronization treatments.
Estación Experimental Agropecuaria Bariloche
Fil: Bruno Galarraga, María Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estacion Experimental Agropecuaria Bariloche. Laboratorio de Reproducción de Rumiantes Menores; Argentina
Fil: Bruno Galarraga, María Macarena. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina
Fil: Cano Moreno, Virginia. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
Fil: Lago Cruz, Beatriz. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; España
Fil: Encinas, Teresa. Universidad Complutense de Madrid. Facultad de Veterinaria. Departamento de Toxicologia y Farmacologia; España
Fil: Gonzalez Bulnes, Antonio. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
Fil: Martinez Ros, Paula. Universidad Cardenal Herrera-CEU. Facultad de Veterinaria. Departamento Produccion y Sanidad Animal; España
description Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results are controversial since fertility rates are commonly affected. The present study aims to evaluate, therefore, the adequacy of hCG in protocols for the synchronization of estrus and ovulation. Ovarian follicle dynamics, occurrence of estrus behavior and subsequent ovulation, quality of corpora lutea, and pregnancy rate after controlled natural mating were assessed in two consecutive trials. The findings indicate that the low fertility rates reported for the protocols based on the administration of hCG for inducing ovulation during estrus synchronization in sheep may be related to a high occurrence of abnormal follicular growth patterns, disturbances, and retardments of ovulation and concomitant formation of follicular cysts in the treated females. These results preclude their practical application to induce ovulation concomitantly to estrous synchronization treatments.
publishDate 2021
dc.date.none.fl_str_mv 2021-07-19T11:44:50Z
2021-07-19T11:44:50Z
2021-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/9836
https://www.mdpi.com/2076-2615/11/4/984
2076-2615
https://doi.org/10.3390/ani11040984
url http://hdl.handle.net/20.500.12123/9836
https://www.mdpi.com/2076-2615/11/4/984
https://doi.org/10.3390/ani11040984
identifier_str_mv 2076-2615
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Animals 11 (4) : 984 (Abril 2021)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.993085

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