Sajid Iqbal

Role Of Single Injection Of Prostaglandin F2 Alpha On Breeding Efficiency Of Buffaloes - 1998

In the present study, a total of twenty Nili-Ravi buffaloes were divided into two equal groups. In group A ten buffaloes were administered with prostagladin F2 alpha (Lutalyse, Upjohn), 2 hours after calving. In group B, ten buffaloes were not given any treatment and designated as control. The reproductive organs of each experimental buffalo were rectally palpated on day 14 and day 21 postpartum. After that twice a week rectal palpation was carried out until the first postpartum oestrus.

The results of present study revealed that cervical and uterine involution was completed significantly (P < 0.05) earlier in group A as compared to group B (28.90± 1.79 and 35.40±3.95 days). There was no significant difference in the diameter of cervix, gravid and nongravid uterine horn at day 14 postpartum. A significant difference between the groups was obtained on days 21, 25 and 28 postpartum in the diameter of cervix and gravid horn. The corpus luteum (CL) of pregnancy regressed very rapidly following calving. The overall period required for complete regression of corpus luteum of pregnancy was (19.20±4.87 days) in treated group and (18.40±6.07 days) in control groups. The difference was significant.

Follicular activity resumed independently of uterine involution. It was, however, delayed slightly by the retained corpus luteum of pregnancy. The mean postpartum interval of initial follicular development was 21.20±5.71 days in treated and 28.20±8.75 days in control groups, respectively. The difference was statistically significant (P <0.05).

Postpartum oestrus interval was shortened in treated group (79.50±19.83 days) as compared to control group (103.0± 17.45 days) and the difference was significant (P<0.05). So it seems beneficial to administer prostaglandin F2 alpha in postpartum buffaloes to reduce the period for uterine involution and enhance the subsequent reproductive performance.

Department of Theriogenology


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