Tratamientos hormonales aplicados posterior a la IATF sobre la tasa de preñez y la viabilidad embrionaria en vacas de alta producción en estrés térmico

Yusep Gómez Marín, José Goicochea Vargas, Wilson Rondón Jorge, Fidel Acosta Pachorro, Magaly Montalvo Martin, Marce Pérez Saavedra, Carlos Ballarte Zevallos, Mauricio Silva Jiménez, Marcelo Ratto Fuster

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

1 Cita (Scopus)

Resumen

The aim of this study was to evaluate the effect of GnRH, hCG and ECG applied 14 days after fixed time artificial insemination (FTAI) on the rate of pregnancy and embryonic and foetal survival in cows under heat stress. The cows (n = 234) were synchronized, inseminated and received 14 days later via i.m. The hormonal application: A) Control group: 2 ml of saline solution (n=56), b) GnRH group: 100 μg of GnRH (n=58), Group c) hCG: 1500 IU of hCG (n=60), and d) ECG Group: 400 IU of ECG (n=60). The diagnosis of pregnancy and the evaluation of the number of corpora lutea (CL) was determined by ultrasonography on days 34, 45 and 60 of the AI. Cows treated with GnRH had a higher pregnancy rate (p<0.05) and no significant differences were found between the other groups. Embryonic and foetal survival between days 45 and 60 was constant in all groups, but one foetal death occurred in the ECG group. There were no significant differences in the proportion of accessory CL between the treated groups and the control group at 60 days of gestation. It is concluded that the administration of GnRH 14 days post-FTAI improves the pregnancy rate in dairy cows under caloric stress.

Título traducido de la contribuciónHormonal treatments applied after the FTAI on pregnancy rate and embryo viability in high-producing dairy cows under thermal stress
Idioma originalEspañol
Páginas (desde-hasta)1653-1661
Número de páginas9
PublicaciónRevista de Investigaciones Veterinarias del Peru
Volumen30
N.º4
DOI
EstadoPublicada - 1 dic. 2019
Publicado de forma externa

Palabras clave

  • Corpus luteum
  • GnRH
  • High-producing cows
  • Pregnancy rate
  • Progesterone

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