EFFECT OF EXOGENOUS SUPPLEMENTATION OF PROGESTERONE ON STEROIDS LEVEL AND FERTILITY IN SHEEP

摘要

The effect of supplementation of progesterone during late luteai phase following breeding on steroids level and fertility in sheep was studied. The mean plasma oestradiol 17-p levels on the day of oestrus in the ewes that subsequently became pregnantwas 8 34 ± 1.55 pg/mi as against 6,33 ± 1 27 pg/ml in non-pregnant ewes, however the difference was statistically non-significant. Following exogenous supplementation, the mean plasma progesterone levels on days 11,13 and 15 of the cycle did not exhibit any significant difference between the treated and untreated control groups Higher lambing performance of 50% was recorded in treatment group while any of the ewes from untreated control group did not conceive.