Vol. 8, Issue 9 (2019)

Author(s):
K Sahithi, K Sadasiva Rao, M Srinivas and N Lakshmi Rani

Abstract:
Heatsynch hormonal protocol was studied for the treatment of anestrum in postpartum lactating Ongole cows (n=8). Following the treatment, 6 cows exhibited estrus after estradiol benzoate injection. The estrus detection rate was 75 (6/8) per cent. Mean time to onset of estrus was observed as 57.3±3.68 h. The per cent of cows that showed intense, intermediate and weak estrus were 33.33, 50.00 and 16.67 per cent. Peak estrus synchrony was observed, with highest number of animals exhibiting estrus between 48 to 72 h with 66.67 (4/6) per cent. The conception rate at induced estrus was 50.0 (4/8) per cent. In the present study, overall conception rate among the postpartum lactating anestrous Ongole cows was higher with 62.5 (5/8) per cent in Heatsynch group compared to 25.0 (2/8) per cent in the control group. The results of the present study with inseminations at induced estrus in postpartum lactating anestrous Ongole cows appears to be an effective tool of managing fertility by using Heatsynch protocol.