First, the cause of
1 infertility caused by thinness. Due to malnutrition, the estrous cycle is disordered or long-term estrus. Rectal examination revealed a small ovarian volume and no follicular development on the ovary.
2 Infertility caused by excessive fertilizer. Lack of exercise, too much feed, and the variety is simple, follicular degeneration and fat infiltration, follicular epithelial steatosis, clinical manifestations are not estrus, rectal examination of small ovarian volume, no follicles and corpus luteum, sometimes found that the uterus is soft, uterine contractility is reduced or Uterine atrophy.
3 Infertility caused by poor feed quality. The nutritional status of dairy cows is not abnormal. It is not suitable for clinical examination to detect diseases. In order to confirm the diagnosis, it is necessary to check and analyze the feed ingredients, and after changing the feed ingredients, pay attention to whether the reproductive function of the cows returns to normal.
Second, the diagnosis of
Infertility caused by poor feed quality is difficult to diagnose, and it is necessary to investigate the feeding management system and analyze the composition of the feed and its source. Infertility caused by over-fertilization is easier to diagnose.
Third, treatment and prevention of
1 Improve the feeding management of dairy cows, diversify the type of feed; 2 increase the exercise time of dairy cows; 3 supplement the feeding of fresh clams and fresh high-quality silage; 4 when the cows are over-fertilized, feed more succulent feed, reduce concentrate and increase exercise. 5, delayed ovulation of cows, injection of chorionic gonadotropin; 6 appropriate vitamin supplements and various trace elements.
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