The use of hCG for inducing ovulation in sheep estrus synchronization impairs ovulatory follicle growth and fertility

Autor: Antonio Gonzalez-Bulnes, Beatriz Lago-Cruz, Teresa Encinas, Paula Martinez-Ros, Macarena Bruno-Galarraga, Virginia Cano-Moreno
Přispěvatelé: UCH. Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Producción Científica UCH 2021
Rok vydání: 2021
Předmět:
Hormonas Sexuales
Sexual Reproduction
eCG
estrus synchronization
0403 veterinary science
Induced ovulation
Follicular phase
lcsh:Zoology
lcsh:QL1-991
reproductive and urinary physiology
media_common
lcsh:Veterinary medicine
Induced Ovulation
HCG
Hormona eCG
04 agricultural and veterinary sciences
Sheep - Reproduction
Ovulación Inducida
Estrus
purl.org/becyt/ford/4.2 [https]
medicine.anatomical_structure
Sincronización
hormones
hormone substitutes
and hormone antagonists
endocrine system
sheep
040301 veterinary sciences
media_common.quotation_subject
hCG
Fertility
Synchronization
Biology
Rumiantes Menores
Article
Hormonas sexuales
Andrology
Hormones
Sex
Estro
Sex Hormones
medicine
Ovarian follicle
Ovulation
Estrous cycle
Reproducción Sexual
General Veterinary
ECG
urogenital system
ESTRUS SYNCHRONIZATION
0402 animal and dairy science
040201 dairy & animal science
Pregnancy rate
Oveja
SHEEP
ovulation
Ovejas - Reproducción
lcsh:SF600-1100
Animal Science and Zoology
Ewes
OVULATION
Ovulación
purl.org/becyt/ford/4 [https]
Hormone
Zdroj: CEU Repositorio Institucional
Fundación Universitaria San Pablo CEU (FUSPCEU)
Animals, Vol 11, Iss 984, p 984 (2021)
Animals
Volume 11
Issue 4
Animals : an Open Access Journal from MDPI
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Animals 11 (4) : 984 (Abril 2021)
INTA Digital (INTA)
Instituto Nacional de Tecnología Agropecuaria
instacron:INTA
DOI: 10.3390/ani11040984
Popis: 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
Databáze: OpenAIRE
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