Sow gilts have a lot to do with the conception of sows, living environment, nutrient feed, etc. These objective factors are all provided by the farmers. Therefore, the prevention and control of sows tying up the tires, the farmers must do the relevant preventive measures. Specific pig raising techniques are as follows: 1, timely breeding. The sows mated in the estrus 24 hours to start ovulation, from the estrus expression point of view, from the excited state to a quiet state, the vaginal discharge of silky mucus, hand pressure sow back, sows do not move, this time the best breeding, This results in low embryo mortality and high litter size. 2. Strengthen the management of sows before conception. Adding protein feed and energy feed 3-14 days before breeding, adding minerals and vitamins at the same time, making it faster to enter the best state of breeding, and strengthening nutrition for lean sows for a longer period before mating. As far as possible to restore the previous physical strength, in order to facilitate breeding, pregnancy, miscarriage, and increase litter size. 3, pay attention to feed quality. Pregnancy sows do not receive mildew, freezing and other contaminated feed. Otherwise, poisoning may easily occur, light embryos may cause death, and severely affect the life safety of sows. 4, appropriate activities. Sows do not exercise regularly during pregnancy. Embryo mortality is about 0.5% higher than that of regular sows. Sows should exercise in a free movement, but should prevent sows from falling or hitting obstacles. 5, adjust the endocrine. One week after mating, 30 mg of progesterone was intramuscularly injected into each sow, which effectively reduced embryo death and prevented stillbirth. 6. Keep the ambient temperature. In the first week of gestation, when the ambient temperature is as low as 32°C-35°C for a short period of time (24 hours), embryonic death increases. Similarly, if the breeding of hot boars results in embryonic death, it is best to The ambient temperature is controlled at 15°C-25°C. Applicator,Medical Dressing,Waterproof Wound Dressing,Wound Care Dressings Henan Maidingkang Medical Technology Co.,Ltd , https://www.mdkmedical.com