With the development of pig-scale breeding and improvement of various conditions, the general introduction of artificial insemination of pigs to improve the fertility rate of artificial insemination of sows, the following five points should be done: The first is to raise a good boar and improve semen quality. Every day in addition to normal feeding three meals, you need to strengthen outdoor exercise for one hour, pay attention to the frequency of sperm extraction (every day semen collection), regular microscopic examination of boar semen quality, whether the quality of the semen is important for the ability of the sow to be fertilized Factors: timely elimination of boars with low semen yield and poor semen quality; timely updating of populations, and timely elimination of inferior male species with low breeding power and breeding genes with recessive genes after 3 years of application of sperm extraction. The second is to promote normal ovulation of sows. In the breeding period, all sows should be allowed to ovulate in normal oestrus so that they can be bred. The third is to grasp the appropriate breeding time. Judging from the estrus symptoms, it is usually best to select the first time for breeding in the estrus 24-40 hours, every 4-12 hours and then the second time. As the saying goes, "small with late, old with the old, not many with the middle of the old." When the estrus vulva pours white silky mucus, the swollen vulva is a good time to inseminate. Fourth, before and after insemination equipment cleaning and disinfection, sows vulva washed with 0.1% potassium permanganate water for anti-inflammatory treatment to prevent the insemination of bacteria or viruses into the sow vagina or uterus, causing sow reproductive tract diseases, As a result, insemination and breeding failed. Ensure semen input volume: Insemination volume 80 ~ 100mL each time, insemination twice in each period of love, interval 8 ~ 12h for the second insemination. If it is not the semen that is currently bred and used, apply heated cups at about 37 degrees for 8-10 minutes to increase sperm motility and reduce sow irritation. The fifth is to do a good job of disease prevention and health care of sows to reduce the impact of disease on sows to increase the conception rate of sows.
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