1, make estrus identification and timely breeding: The purpose of estrus identification, is to grasp the most suitable breeding time, in order to obtain the best results. For cattle, in addition to the observation of apparent behavior and mucus identification before mating, a rectal examination should be performed. According to the development of follicles, timely insemination, this method is the most accurate method. In the process of artificial insemination, we must abide by the operating procedures. From estrus identification to cleaning and disinfecting equipment, the thawing of semen to the insemination process must be strictly aseptic, and the poor mastery of any one part will affect the conception rate.
2. Perform early pregnancy diagnosis to prevent misalignment: In order to keep abreast of whether or not the pregnancy after the insemination of the cow, regular pregnancy examination is of great importance to improve the breeding rate of the herd and reduce empty arms. Through the early pregnancy diagnosis, it is possible to determine the pregnancy as early as possible, so as to treat it differently. For pregnant cows, fetuses should be strengthened to ensure normal development of the fetus, which can prevent miscarriage caused by estrus after pregnancy. For non-pregnant cows, we must find out the reasons in a timely manner, take appropriate measures, and compensate for the lack of opportunity to reduce empty time.
3. Prevention and treatment of repeated infertility: Repeated infertility is an important cause of reduced pregnancy rate in the cow. There are many factors causing repeated infertility in cows. The main factors are endometritis and abnormal ovulation. Stomach retention is the main cause of endometritis. Therefore, the emphasis on the prevention of obstetric and genital tract diseases from cows' birth has important significance in improving the conception rate.
4, control of reproductive diseases: Cow breeding diseases are mainly ovarian, reproductive tract and obstetric diseases in three major categories. Ovarian disease affects the rate of mating and fertility by affecting ovulation. Some diseases can also cause embryonic death and complicated obstetric diseases; genital tract diseases mainly affect the development and survival of embryos, and some of them can also cause ovarian diseases; Genital and ovarian diseases even cause maternal and fetal deaths.
5, to promote postpartum fertility in early mating: due to ovarian dysfunction and genital regeneration is slow, and affect postpartum estrus delayed cows. To enable cows to have normal estrus after birth and to shorten the calving interval, in addition to strengthening feeding management, routine hormone treatment of cows is a feasible method. In 25 days and 40 days postpartum cows, 25mg prostaglandin (PGF2α) and 25 international units of oxytocin were given to the cows, respectively, which can significantly increase the post-natal estrus time of cows, shorten the calving interval, and increase the number of females. The purpose of fertility.
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