Effects of Injecting Luteinizing Hormone Releasing Hormone A3 on the Reproductive Performance of Cows
In order to explore the effects of injecting Luteinizing hormone releasing hormone A3(LRH-A3)on the fertility rate of artificially inseminated cows,and on the estrus of delayed ovulation cows.Test 1:60 healthy Simmental crossbred cows were divided into 3 groups,the control group,the experimental group I and experimental group II.After the text,the fertility rate of cows in each group was counted.Test 2:40 Simmental crossbred cows with delayed ovulation were randomly divided into 2 groups.The experimental group was intramuscularly injected with 25μg LRH-A3 on the 1st,3rd and 5th days of the experiment,and 0.3 mg of Cloprostenol sodium was injected with the control cows on the 12th day.The estrus rate and fertility rate were counted and compared.The results showed that the fertility rate in experimental group II(80%)was higher than in control group(50%)and experimental group I(65%)in test 1.The estrus rate and fertility rate of the experimental group(60.0%,66.7%)were higher than those of the control group(25%,40%)in test 2.The above results showed that LRH-A3 injection could improve the fertility rate of artificial insemination in cows and promote estrus in cows with delayed ovulation.
万方数据
维普
