USE OF PROGESTERONE-BASED FTAI PROTOCOL FOLLOWED BY GnRH OR hCG TREATMENT ON DAY 6 POST-AI IN REPEAT BREEDER CATTLE

Authors

  • A A S KUNDE Department of Veterinary Gynaecology and Obstetrics Rajiv Gandhi Institute of Veterinary Education and Research Kurumbapet, Pondicherry - 605009
  • M S RAJU
  • K MURUGAVEL

Keywords:

Co-synch, Conception rate, GnRH, hCG, Progesterone

Abstract

Repeat breeder cattle (n=45) were synchronized using intravaginal progestational device (TRIU-B) based
Co-Synch protocol. On day 6 post artificial insemination (AI), all the animals were administered (i.m.) either 10
μg GnRH analogue, (n=15), 1500 IU hCG (n=15) or normal saline (n=15). Pregnancy diagnosis was carried
out on day 45 post-AI. Jugular vein blood was collected on day 6 and day 12 post-AI for serum progesterone
estimations. On day 12 post-AI, serum progesterone values both overall as well as in the conceived animals were
high (p<0.05) in hCG group compared to control. In GnRH, hCG and control group, the respective conception rate
was 40%, 46.7% and 33.3%. In brief, administration of hCG on day 6 post AI improves subsequent luteal profile
with tendency for better conception rate in repeat breeder cattle.

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Published

2022-12-25

Issue

Vol. 39 No. 1 (2018): Indian Journal of Animal Reproduction

Section

Research Article

How to Cite

KUNDE, A.A.S., RAJU, M.S., & MURUGAVEL, K. (2022). USE OF PROGESTERONE-BASED FTAI PROTOCOL FOLLOWED BY GnRH OR hCG TREATMENT ON DAY 6 POST-AI IN REPEAT BREEDER CATTLE. The Indian Journal of Animal Reproduction, 39(1), 57–58. Retrieved from https://acspublisher.com/journals/index.php/ijar/article/view/3744