Vol. 10, Special Issue 4 (2021)

Author(s):
Periyannan Mani, Selvaraju Mani, Ravikumar Kaliannan and Raja Angamuthu

Abstract:
The objective of the present study is to report the pattern of induced estrus before the superovulatory treatment in Kangayam donor cows. A total of 16 Kangayam donor cows were selected for this study. The animals were treated with two doses of 500 µg PGF2α intramuscularly at an interval of 11 days. At 24 hours after the administration of 2nd dose of PGF2α, all the Kangayam donor cows were observed for estrus response, onset of estrum, sign of induced estrus, duration of induced estrus, fern pattern and intensity of estrus. The onset of estrus was 61.00±1.89 hours, duration of estrus was 18.25±1.4 hours and the intensities of estrus were 62.5%, 25% and 12.5% as intense, intermediate and weak respectively in Kangayam donor cows.