Induction of Estrus and Fertility Response in True Anoestrus Buffaloes Using Intravaginal Progesterone Sponge During Summer

Abstract

Present study was carried out to study the efficacy of intravaginal progesterone sponge for induction of estrum in post partum anoestrus buffaloes during summer. True anoestrus animals were identified by repeated rectal examinations twice at 10 days interval apart having the small and smooth ovaries without any follicular activity. Out of 40 animals identified, 30 were treated with intravaginal progesterone sponge for 10 days and PGF2 injection was given one day prior to removal of sponge. Remaining 10 animals were kept as anoestrus control without treatment. The animals were watched closely for change in external gentallia after sponge removal and for estrus symptoms. The animals exhibiting estrus were inseminated artificially. Estrus was induced in 80% of animals (24/30) and the conception rate was 66.66% (16/24). This result indicates the better possibilities of inducing ovarian cyclicity in functionally anoestrus buffaloes by cost effective intravaginal progesterone sponge.