(I) Causes of prolonged production of sows 1. Body condition is too fat or too thin when sows are giving birth. During pregnancy, feeding sows at high levels for a long time will increase the rate of stillbirths in sows. Excessive sows will cause excessive body fat, resulting in excessive fat deposition around the uterus, subcutaneous, and peritoneum. When sows are farrowed, the sows are prone to fatigue, the birth time of litters is longer, and the mortality rate of the piglets is high. However, when the sows are too thin, due to lack of productive force during delivery, the uterus is weak and prone to prolonged labor. Increased fetal deaths. 2, sows eat too much before the prenatal, resulting in the sow during the delivery of the bowel overburdened, oppression of the fetus caused piglets difficult to produce, so that when the delivery of prolonged labor. 3, hot summer weather, sows are prone to constipation. Due to constipation, gastrointestinal emptying is blocked for a long time, so that the feces is full of the intestines, oppressing the birth canal and affecting the birth of the fetus; at the same time, the sows suffer from constipation, long-term anorexia does not eat material, physical weakness, lack of delivery, sows are easily dystocia or prolonged labor, stillborn occur. 4, due to high temperature in summer, sows generally longer production process. According to statistics, the sow piglets delivered at high ambient temperatures from October to October have an average piglet mortality rate of 0.3 to 0.4 heads per month lower than the ambient temperature, which is mainly due to the high temperatures in the summer causing sows. The prolonged production process. Due to the high temperature in summer, the sow is affected by heat stress and the body secretes too much stress hormone, epinephrine. Epinephrine causes uterine vasoconstriction, which leads to a decrease in oxytocin reaching the uterine smooth muscle. The uterine muscle does not receive enough oxygen, causing the frequency and intensity of uterine contractions to decrease, resulting in prolonged delivery. 5, individual first-born sows because of the first delivery, the stress is greater, often irritability, restlessness, the body will also secrete excessive epinephrine, thereby inhibiting the number of oxytocin reaches the uterine smooth muscle, so that when giving birth Extension of labor. 6. When the sow is infected with a reproductive disease or a general high fever disease, it will cause sows to produce stillbirths and prolonged labor. (II) Control measures 1. Control the body condition of the sow during delivery and prevent it from being too fat or too thin. The body condition of the sows at the time of childbirth in actual work should be full back, with a flat upper line, without any prominent bones. Below the lumbar vertebrae, there should be a lacune in front of the ribs and in front of the pelvis. Therefore, pregnant sows should be restricted by the fetus in the growth and development of the law 98 days before and the sows are fat and thin, feeding from 100 days of pregnancy to 3 days before the full free to eat, this will not only improve the newborn piglets weight, but also Prevent sows from getting too fat. 2. Sow must feed before giving birth. In order to reduce the adverse effects of overweight gastrointestinal burden on litter size, sows should start restriction within 3 days before birth (based on the expected date of production). The limiting standard is: 3 kg per head per day on the 3rd day before delivery, prenatal 2 kilograms per day per head, 1 kilogram per day per day on the first day of prenatal day. When sows are farrowing, the farrowing meal is not fed and 0.5 kilograms are fed every other day. For example, the sow gives birth in the morning, and the sow in the morning. Stop feeding, feed 0.5 kg in the afternoon, give birth in the afternoon, stop feeding in the afternoon, feed 0.5 kg in the morning on the first postpartum, feed 0.5 kg in the afternoon, 2 kg per head on the 2nd day after delivery, and post 3 days after delivery 3 kilograms per day, 4 days postpartum - weaned freely. That is, the number of prenatal restrictions is more or less, and postpartum feeding is increasing from less to more to prevent postpartum indigestion of sows. 3, to prevent prenatal constipation sows. It is suggested that 1% sodium sulfate and 0.5% rhubarb soda powder should be mixed into the feed 1 week before and after the sow to make the feces of the sow soft and moist, which will facilitate the smooth movement of the defecation. If the conditional pig farm can use lactation, better. 4. In the summer, it is necessary to strengthen the sunstroke prevention and cooling of pregnant sows, especially the sows in the later stage of pregnancy and the sows in the upper part of the breeding bed. The pregnant sows are limited in size and have high density and heat dissipation, especially during the late pregnancy. Eat more, increase body heat after eating, body temperature rose about 0.5 °C before eating, reaching 39.5 °C, when the sow body temperature of 102 ~ 110 days of pregnancy to maintain the temperature for a long time, the piglet death rate increased at the time of delivery, so when When the ambient temperature reaches 30°C or above, it is recommended to spray and cool the maternal sow at intervals of half an hour, reduce the temperature of the laboring sows in the delivery room, and reduce the impact of heat stress on the sows. 5. For the farrowing house, the house should be kept quiet as much as possible, especially for the primiparous sows. When the sire is irritated, massage the breast can make it quiet, which is very meaningful for promoting smooth delivery. 6. Pigs dry the mucus after birth. After drying the coat, they should be placed immediately next to the sow's breasts. Through the continuous sucking of the nipples, the piglets can stimulate the sow to secrete oxytocin and cause uterine contractions. This not only helps Smooth delivery and shortening of labor will also help milk discharge. 7. Do a good job in the vaccination work to prevent the sow from infecting the disease and timely treatment of the affected pigs, especially the fever sows. (c) Correct use of oxytocin 1. During sow delivery, do not use oxytocin under smooth farrowing conditions (one piglet is produced within 10 minutes), but when the next piglet is still not produced within 30 minutes, it is recommended to inject 10 IU immediately. For midwifery, if the piglet is still not produced within 20 minutes after the injection of oxytocin, it is necessary to check if the sow is difficult to produce so that timely delivery of midwifery can be achieved. 2, using oxytocin should pay attention to 4 points: (1) Sows with unopened cervix mouth (ie, the first piglet was not produced) are banned. (2) Dystocia sows should be banned, such as pelvic stenosis, birth canal stenosis. (3) Prohibition of overuse: In the delivery process, an injection dose cannot exceed 10 international units. High-dose oxytocin injection will cause strong uterine contractions and paralysis. Piglets will be more difficult to produce and die. Postpartum uterine fatigue , May cause the retention of the placenta to cause mycitis. (4) After the delivery, the injection of 3 to 4 international units of oxytocin to the sow will help the complete discharge of the placenta and lochia, thereby reducing the incidence of metritis. Antigen Test Kit, Antigen Rapid Test Kit, Antigen Test Kit COVID, Antigen Diagnostic Test Kit, Swab Antigen Test Kit, Corona Antigen Test Kit Antigen Test Kit Antigen Test Kit, Antigen Rapid Test Kit, Antigen Test Kit COVID, Antigen Diagnostic Test Kit, Swab Antigen Test Kit, Corona Antigen Test Kit Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com