Ultrasonographic Studies of Follicular Activities in Clomiphene Citrate Treated Anoestrus Cows

An experiment on ultrasonographic studies of follicular activities in clomiphene citrate treated  anoestrus cows was conducted. Ultrasound scanning was performed to record the follicular activities  on alternate day throughout one estrous cycle for control group and from drug administration to  induction of estrus in treatment group. The postpartum induced estrus (treatment group) and regular  estrus (control group) differed highly significantly (p<0.01) with respect to number of follicles involved  in ovulatory wave (6.67 ± 0.21 Vs 5.00 ± 0.45) and significantly (p<0.05) with respect to growth  rate (1.82 ± 0.34 Vs 1.04 ± 0.94 mm/day) and increase in diameter of dominant follicle (7.58 ±  0.72 Vs 10.2 ± 0.47 mm). Maximum diameter of ovulatory follicle in induced estrus was greater  than regular estrus (16.12 ± 0.56 Vs15.18 ± 0.47 mm), however, it differed non-significantly.