Estrus and fertility response of postpartum anestrus Murrah buffaloes to Crestar and OvSynch treatment regimens.

摘要

Primiparous postpartum anestrus Murrah buffaloes (15) were randomly divided into 2 groups to receive either Crestar (n=7) and OvSynch treatment (n=8) to evaluate their efficacy for induction of estrus. Estrus was induced in 100% and 87.5% buffaloes in Crestar and OvSynch group, respectively, with mean interval to ovulation of 2.86+or-0.13 and 1.29+or-0.36 days. The postpartum interval to conception was also higher in OvSynch group animals (332.8+or-23.4 vs 238.0+or-23.6 days). A conception rate of 71.4% to first insemination at induced estrus was recorded in Crestar group, whereas it was only 12.5% in OvSynch treated animals though respective overall pregnancy rates up to third insemination were 85.7 and 75%. In conclusion, ovulatory estrus could be successfully induced following Crestar treatment yielding satisfactory conception rates at induced estrus.