Fertility Response Following Two Estrus Synchronization Protocols in Anestrus Beetal Goats
DOI:
https://doi.org/10.48165/ijar.2026.47.01.09Keywords:
Goats, Beetal, Postpartum Anestrus, Fertility, Vaginal mucus electrical resistanceAbstract
This study evaluated the comparative efficacy of GnRH and eCG-based estrus synchronization protocols with or without short-term progesterone in postpartum anestrus Beetal goats. Twenty goats were administered Buserelin acetate (6 µg IM, day 0) and randomly allocated to a progesterone group (TRIU-B, 400 mg; n=10, Group I) or a non-progesterone group (n=10, Group II). On day 7, TRIU-B was removed, and all goats received cloprostenol sodium (75 µg IM) and eCG (400 IU IM). Natural mating after 12h intervals followed estrus detection. Estrus induction was 100% in both groups. Pregnancy (70% vs. 60%) and kidding rates did not differ significantly (P>0.05). However, estrus onset occurred earlier (P<0.05) in the progesterone group. Vaginal mucus electrical resistance decreased significantly (70–80 Ω) at estrus com pared with day 0 and day 7 (85–115 Ω). Serum biochemical parameters showed no significant variation between groups. In conclusion, both protocols were equally effective in inducing estrus and achieving satisfactory fertility without affecting serum biochemical profiles. The addition of short-term progesterone advanced estrus onset but did not significantly improve fertility outcomes in postpartum anestrus Beetal goats.References
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