EFFICACY OF PRESYNCH-OVSYNCH-56 PROTOCOL IN INCREASING THE CONCEPTION RATE IN REPEAT BREEDER COWS

Authors

  • H HEMALATHA Department of Veterinary Gynaecology and Obstetrics, Rajiv Gandhi Institute of Veterinary Education and Research, Kurumbapet, Puducherry-605 009.
  • S KANTHARAJ
  • K MURUGAVEL
  • M S RAJU
  • D ANTOINE

Keywords:

Presynch-Ovsynch-56, Repeat breeder cows, Conception rate

Abstract

A total of 30 repeat breeder cows that did not conceive even after three or more inseminations were divided into
two equal groups. Cows in Group-I were kept as control and inseminated once during the observed estrus. Cows in
Group-II (Treatment) were subjected to Presynch-Ovsynch-56 protocol and subjected to Fixed Time Artificial
Insemination. Blood was collected from both the groups on the day of AI and day 6 post-AI for serum progesterone
estimation. Cows in both groups that returned to estrus following the first AI were re-inseminated. There was no
significant difference in the mean serum progesterone concentration between the groups both on the day of AI and
day 6 post-AI. There was no significant difference in the first, second service and overall conception rate between the
groups. However, Presynch-Ovsynch-56 protocol resulted in an acceptable overall conception rate of 33.33 % in
repeat breeder cows compared to 20 % obtained in control repeat breeder cows.

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Published

2022-12-31

Issue

Vol. 41 No. 1 (2020): Indian Journal of Animal Reproduction

Section

Research Article

How to Cite

HEMALATHA, H., KANTHARAJ, S., MURUGAVEL, K., RAJU, M.S., & ANTOINE, D. (2022). EFFICACY OF PRESYNCH-OVSYNCH-56 PROTOCOL IN INCREASING THE CONCEPTION RATE IN REPEAT BREEDER COWS. The Indian Journal of Animal Reproduction, 41(1), 44–45. Retrieved from https://acspublisher.com/journals/index.php/ijar/article/view/3918