Effect of preovulatory follicle volume and serum oestradiol concentration on conception rate in postpartum murrah buffaloes

The oocytes recovered from large sized follicles have more potential for both meiotic and embryonic development, which helps in conception rate in cows and buffaloes. This investigation was carried out to study the effect of pre-ovulatory follicle volume, serum concentration of estradiol on conception rate in postpartum cyclical Murrah buffaloes during spontaneous estrus. Twelve postpartum cyclical buffaloes were randomly selected and double artificial insemination was done (Double AI) at an interval of 24 h during oestrus. Sonographic evaluation was performed during natural estrus (First AI) to study the POF volume and pregnancy diagnosis was done on day 28 post AI. Blood samples were collected and serum was separated at the time of first AI to quantify the serum estradiol concentration and it was correlated with the POF volume, oestrus intensity and conception rate. It is concluded that the pre-ovulatory follicle volume, the serum estradiol 17 beta concentrations and oestrus intensity on the day of AI had no correlation with conception rate in postpartum buffaloes.