Follicular Dynamics and Endocrine Profile during Normal Estrous Cycle and Early Pregnancy in Surti Buffaloes

The study was conducted on Surti buffaloes for follicular dynamics and endocrine profile during normal estrous cycle (n=6) early pregnancy (n=6). In cyclic pregnant buffaloes, one-wave (33.33% vs. 50.00%) two-waves (66.66% development recorded, without three-wave pattern. buffalo, the length of duration inter-ovulatory interval were little shorter in one wave cycles than two (22.50±0.50 23.25±0.25 days). number follicles differed non-significantly within between buffaloes. mean maximum diameter dominant follicle second significantly larger animals pattern (1.09±0.02 vs 0.73±0.02 cm). CL size recorded 1.21±0.02 1.52±0.05 cm (P<0.05) one- two-wave cycles, respectively, whereas corresponding 1.50±0.04 1.55±0.07 significant difference. Thus with (1.50±0.04 animals, increased gradually up to day 8 (1.30±0.04 cm) then remained stable 18 (1.26±0.15 cm), followed by regression display next estrus 19 21, 10 (1.48±0.07 it maintained till 22 (1.46±0.04 monitoring. largest (0.98±0.07 variable metestrus diestrus phase a new developed proestrus reaching ovulatory (0.99±0.09 days (0.76±0.05 not size. concentrations serum progesterone lowest peri-estrus phase, through early-luteal concentration mid-luteal (4.50±0.88 4.67±0.95 ng/ml) declined late-luteal inverse trend estradiol profile. However, levels initially higher (6.17±0.32 8.13±0.55 basal throughout luteal phase. progesterone/estradiol harmony ovarian both FSH, LH kisspeptin did vary statistically periods status or reproductive at any periods. dropped advanced as compared first trimester.