Time of insemination and conception in cows and buffaloes under field condition

Abstract

Study was carried out  on 184 cows and 142 buffaloes of village, to know the relationship between time of insemination andconception. These animals had apparently clear oestrual discharge at the time of artificial insemination. Cows inseminated at0-6 and 31-48 hr interval of oestrus symptoms, did not conceive. Cows which were inseminated at 11-14 hr interval had maximumconception rate (53.72%) followed by (47.05%) insemination at 7-10 hr. Conception rate decreased subsequently in cows whichwere inseminated after 14 hr of oestrus symptoms. In contrast to cows, conception rate was maximum (50.00%) in buffaloesafter insemination at 23-26 hr interval of oestrus symptoms. Conception rate was also 40.00% after insemination at 19-22 hr.No conception occurred when buffaloes were inseminated up to 10 hr of oestrus symptoms. This study reveals that in comparisonto cows, higher conception in buffaloes is achieved after insemination at later stage which may be due to their nature ofdelayed ovulation.