First, the reasons for the occurrence of dystocia 1, gilt mating too early, pelvic hypoplasia, the fetus can not produce a smooth delivery. 2, sows intake, resulting in sows too fat, uterine contractions when delivery is weak. 3, sows suffering from malnutrition, lack of exercise, abdominal muscle contraction at delivery. 4, mating discomfort, a small number of piglets, fetus is too large or gilt in the late feeding too much, guide the fetus is too large. 5, fetal fetal position, malformation is not correct, it is difficult to successfully produce in the production. 6, during childbirth bladder urine or intestinal accumulation of a large number of feces, vaginal scars, stenosis, vaginal edema caused by narrow swelling of the birth canal, affecting normal fetal delivery. 7, premature or incorrect midwifery midwifery, leading to vaginal edema. Second, the clinical manifestations of dystocia 1, amniotic fluid has been outflow. Sow frequently blame, but no fetal output. 2. After one piglet was produced, no other piglets were produced at intervals of 2 hours. The sow was uneasy and showed pain. Third, prevention measures 1, in the selection of gilts can not be too strict requirements of the streamlined pigs, under normal circumstances, the arm is too full sows have a relatively high probability of dystocia. 2. The breeding age of gilts is 7.5 to 8 months old, and the weight is 115 to 125 kg. The continuous estrus can be used more than 2 times to breed. 3. The high incidence of gilt dystocia has a great relationship with breeding management after breeding. After 80 days of mating, it is easy to increase the fetus's body weight by increasing the feeding amount, and dystocia occurs. 4. The sow's feeding amount should be determined according to the specific conditions of the sow. It should not be over-fat or over-slim, so as to avoid any culprit or incapacity during childbirth. 5, when the weather is hot, special attention should be paid to calcium supplementation, so as to avoid the lack of calcium due to calcium deficiency, even if the intramuscular injection of oxytocin is also ineffective. Fourth, dystocia treatment 1, such as found when the sow contract and punish weakly, 20 ~ 40IU intramuscular injection of oxytocin, a small number of multiple times, each interval 30min, not a large dose of oxytocin, so as not to shrink the uterus Excessive force causes the fetus to suffocate and suffocate. 2, such as the fetus is too large, the head has entered the birth canal but can not take it out on their own, can take artificial labor, hand disinfection, coated with lubricants, into the birth canal, hand hooked on the fetal capsule, along the uterus contraction slowly Pull the baby out. 3, if found that the fetus enters the birth canal dystocia, hand disinfection after extending the birth canal, one hand grasp the fetus's head or tail, first push inwards, and then seize the other two forelegs not involuntarily indented, remove the fetus. 4. If the above methods are all invalid, Caesarean section will be required. When laparotomy is performed, special attention must be paid to sanitation and disinfection. Care should be taken after surgery to prevent infection.
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