EFFECT OF PROGESTERONE SUPPLEMENTATION ON CONCEPTION RATE IN REPEAT BREEDER CATTLE

Abstract

The effect of progesterone on conception rate was studied in 48 repeat breeder crossbred cows. 250 mg progesterone was administered at 5th, 12th and 19th, day after A.I. in treatment group. Animals both in treated and control groups were free from detectable genital infection and other reproductive abnormalities. First service conception rate was 39.13% in treated animals (n=23) while it was only 8.00% in controls (n=25). Thus administration of progesterone in repeat breeder crossbred cattle at first breeding increases the conception rate of treated group by 31.13% over the control for first service conceptions. The overall conception rate of 65.21 % for treated group was comparatively higher than overall conception rate of 48% for control group.