First, the cause 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. The amniotic fluid has already flowed out. The sow is frequently responsible, but no fetal output is seen.
2. After one piglet was produced, no other piglets were produced at intervals of 2 hours. The sow was uneasy and showed pain.
Third, preventive 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, weight is 115 to 125 kg, and estrus can be performed more than 2 times before breeding.
3, the high incidence of gilt dystocia has a great relationship with the breeding management after mating, such as 80d after mating, it is easy to make the fetus overweight, and the occurrence of 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. If you find that the sow is shrinking and your weakness is weak, oxytocin 20 to 40 IU is injected intramuscularly, a small number of times, each time interval 30min, you can not use oxytocin in a large dose to avoid excessive uterine contractility, so that the fetus Suffocate death.
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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