Effect of melatonin implantation prior to ovsynch plus cidr protocol on subsequent ovarian activity and pregnancy rate in summer anestrous Murrah buffaloes

For assessing the impact of melatonin pre-treatment in summer anestrous Murrah buffaloes on subsequent reproductive activity a fixed time artificial insemination (FTAI) protocol, 83 were subcutaneously inserted 2x4 mm size absorbable (MT) implants (18 mg/50 kg b wt) at base left ear and 38 used as non-implanted controls. On day 35 post-MT, treatment control group subjected to FTAI protocol (Ovsynch plus CIDR). Ovarian ultrasonography jugular vein blood sampling was carried out 7 10 7-post AI. Overall pregnancy rate 90 post-AI MT higher compared (55.4 vs 31.6%, P<0.05), along with (P>0.05) plasma progesterone former which conceived subsequently their non-pregnant counterparts. Moreover, had increase dominant follicle diameter between group. post-AI, luteal profile pregnant murrah better (P<0.05) counterparts (CL: 14.80±0.70 10.82±0.46 mm, P4: 1.54±0.07 1.04±0.08 ng/ml). In conclusion, could be associated Ovsynch+CIDR protocol.