Ovarian Follicular Dynamics around Estrus in
Beetal and Teddy Goats
Hasan Riaz, Nasim Ahmad* and Muhammad Rizwan
Yousuf
Department of Theriogenology, Faculty of
Veterinary Sciences, University
of Veterinary and Animal Sciences, Lahore, Pakistan
*Corresponding author: drnasim@yahoo.com
Abstract
Due to higher fecundity rate over Beetal goats,
it is assumed that Teddy goats have higher ovarian
activity. Therefore, the current study tested the hypothesis that ovarian
follicular population (number of small (1-3 mm), medium (>3-5 mm) and large
follicles (>5 mm), size of the ovulatory follicle, and ovulation rate (No. of
CL/No of ovulated goats), using transrectal ultrasonography are different
between Beetal and Teddy goats of Pakistani origin. Beetal (n=6) and Teddy (n=8)
does were synchronized using double PGF2a injections 10 d apart and were scanned
on Days -2, 0 (estrus) and +2. The onset of estrus was assessed by aproned
bucks. Mean number of small follicles were higher (P<0.05) in Beetal goats,
compared to Teddy goats, on days -2, estrus and +2. The ovulatory follicle
diameter, and ovulation rate were found non-significant between Beetal and Teddy
goats. It is concluded that Beetal goats have greater population of small
follicles around estrus compared to Teddy goats. Future studies can be based on
the follicle recruitment and atretic factors in Beetal goats to enhance the
production.