Vol. 10, Special Issue 3 (2021)

Author(s):
Suhas Suresh, Sahadev Annayappa, Narasimhamurthy, Narayana Swamy Muniyappa, Guruprasad Rachaiah, Santhosh Chickaankadahalli Ramachandra, Suchitra Bidare Raju and Rashmi Srinivas

Abstract:
The objective of present study was to document various reproductive parameters in Hassan ewes using various estrus synchronization protocols. Thirty apparently healthy non-pregnant Hassan ewes were randomly assigned to three groups with ten each. The ewes were estrus synchronized using Avikesil-S^® intra-vaginal sponge for seven days followed by 125 μg cloprostenol, on day of sponge retrieval. In Group I, ewes received 300 IU PMSG on the same day, ewes of Group II received 4 μg buserelin actetate, 36 h thereafter and Group III ewes received 300 IU PMSG on day of sponge removal and 4 μg buserelin acetate 36 h post sponge withdrawal. The treated ewes were monitored until lambing with pregnancy diagnosis using ultrasonography on day 30 post mating and results were recorded. The duration of estrus, gestation period, lambing rate, litter size, sex ratio and birth weight did not differ significantly among the treated groups. The estrus duration, gestation length, lambing rate, litter size, sex ratio and birth weight of lambs, respectively were 30.22 ± 1.18 h, 151.54 ± 0.43 days, 100 percent, 1, 66.67:33.33 percent and 3.04 ± 0.07 kg.