The study was conducted in female Black Bengal goat to investigate the number of ovulation during gestation period by Ultrasound Image (USG). Female kids of three months of age were placed in three groups with five numbers in each group; 1st TG with supplementary nutrition and a buck, 2nd TG with supplementary nutrition and 3rd TG as control. Due to permanent exposure of buck and good plane of nutrition, the animals under TG 1 attained puberty significantly (P<0.01) earlier than other two groups. Average body weight of animals of TG1 (10.0 kg) was also recorded to be lowest. Most failure of conception was noted in TG 1 as reflected by its significantly higher (P<0.05) number of services (3.6) than other two groups (2.2 and 2.0 respectively). Highly significant (P<0.01) variation in respect to age of 1st kidding was observed, the animals under TG 1 took least time, but body weight of animals of TG 3 was least. Post-partum estrus was also recorded to be earliest (3 to 6 weeks) in first group of animals than the other two. By ultrasound imaging technique a single number of Corpora lutea (CL) was counted for individual animal under different treatment group on the 11th day of oestrus cycle, with an exception of three CL in one animal of the first treatment group. Out of total 17 CL counted, 11 were found on the left ovary. Number of ovulation observes by ultrasound imaging, was confirmed through laparotomy.

Highlights

• Total number of ovulations was confirmed by ultrasound imaging.
• Ultrasound imaging is a best technique to confirm exact number of ovulations without surgical interventions.