Importance of the corpus luteum at the beginning of the protocols to syncronize estrus in sheep

Authors

  • Angel Campero-Cruz Colegio de Postgraduados, Programa de Ganadería.
  • María Teresa Sánchez Torres Esqueda Colegio de Postgraduados
  • José Luis Figueroa-Velasco Colegio de Postgraduados, Programa de Ganadería.
  • José Alfredo Martínez-Aispuro Colegio de Postgraduados, Programa de Ganadería.
  • Rafael Nieto-Aquino Tecnológico Nacional de México campus Ciudad Valles, Programa de Ingeniería en Agronomía.
  • José Luis Cordero-Mora Colegio de Postgraduados, Programa de Ganadería.
  • Susana López-García Colegio de Postgraduados, Programa de Ganadería.
  • Israel Martínez-Cruz Colegio de Postgraduados, Programa de Ganadería.
  • Mario Cárdenas-León Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Laboratorio de Biología de la Reproducción.

DOI:

https://doi.org/10.19136/era.a10n3.3312

Keywords:

Estradiol; follicular wave; progesterone; prostaglandin; reproduction

Abstract

The aim was to examine the exogenous supply of progesterone, and the influence of the corpus luteum (CL) at the beginning of the estrus synchronization protocols in sheep, for 6 and 11 days, on reproductive variables. The sheep were presynchronized to obtain a premature or functional CL at the beginning of the synchronization period to be evaluated. Estrus presentation was lower in short treatments; This triggered a difference (p < 0.05) in pregnancy rate between short and conventional treatments. On the day of estrus, steroid concentration was different: progesterone was higher in short treatments; while estradiol was lower in the short treatment with CL. The presence of a premature or functional CL at the initiation of the treatments commonly used to synchronize estrus does not modify the expression of the reproductive variables; Nevertheless, in short treatments the expression is affected. It is important to use ultrasonography to corroborate what happened at the ovarian level. 

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References

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Published

2023-12-18

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Section

SCIENTIFIC NOTE

How to Cite

Campero-Cruz, A., Sánchez Torres Esqueda, M. T., Figueroa-Velasco, J. L., Martínez-Aispuro, J. A., Nieto-Aquino, R., Cordero-Mora, J. L., López-García, S., Martínez-Cruz, I., & Cárdenas-León, M. (2023). Importance of the corpus luteum at the beginning of the protocols to syncronize estrus in sheep. Ecosistemas Y Recursos Agropecuarios, 10(3). https://doi.org/10.19136/era.a10n3.3312

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