There are many factors affecting the conception rate of dairy cows, including semen products, the health status of cows' reproductive tracts, feed and nutritional status of dairy cows, feeding and management conditions, breeding seasons, climate and environmental factors, and the technicians' skills. Here only talk about estrus affecting the conception rate of dairy cows, breeding factors: 1, the cow's estrus cycle. The estrous cycle was 61% in the normal range of 18-25 days, and the abortion rate was below 46% in the estrous cycle below 18 days and over 25 days. 2, ovulation after estrus time. After 12 to 36 hours of estrus, the ovulation fertilization rate was 62%, and the fertility rate within the 12 hours and 36 hours after estrus was 43%. The former was 19% higher than the latter. 3, cow uterus health status. Normal and abnormal uterine pregnancy rates were 62% and 46%, respectively, and the former was 16% higher than the latter. 4, estrus breeding season. The rate of conception fertility of the estrus mating cows in summer and autumn and winter and spring were 57% and 61%, respectively, and the former was 4 percentage points lower than the latter. 5, insemination times and time. + Emotional period of insemination in the case of cows The pregnancy rate of 60% in the case of insemination in the case of cows is 58%. There is no significant difference between the two. 6, insemination site. It is best to lose to the base of the uterus or uterine horn. The rate of fertility in the depth of the uterine horn is less than the rate of conception at the base of the uterine horn. Dental Instrument Series,Saliva Ejector,Dental Saliva Ejectors,Dental Material Ejector Ningbo Carest Medical Instrument Co.,ltd , https://www.carestmed.com