Follicular Dynamics during Estrous Cycle in Murrah Buffaloes

An experiment was conducted to study the follicular dynamics during estrous cycle in Murrah buffaloes. Seven animals of 5 to 10 years were selected for the study. All the animals were synchronized as per the ovsync protocol and the pair of ovary of each animal was scanned by ultrasonography machine on 0, 3^rd, 7^th, 11^th, 14^th, 17^th and 21^st day of estrous cycle. The non-significant difference was observed in antral follicle count of 3 to 5 mm, 5 to 8 mm and follicles count (> 3 mm). Whereas, significantly (p<0.05) lower mean values were recorded on the day of estrus (0.14 + 0.14) as compared to 3^rd, 7^th, 11^th, 14^th, 17^th and 21^st day of estrous cycle. The significant individual variation (p<0.05) was recorded in average mean of 3 to 5 mm and total antral follicle count (>3). However, the difference for 5 to 8 mm and >8 mm was non significant. The positive correlation of low and high antral follicle count was observed in the present study. Two animals of low antral follicle count remained non pregnant and two animals showed three follicular waves during estrous cycle.