Dystocia is at the time of delivery or abortion, the sow can not naturally produce the fetus. In a broad sense, prolonged gestation (more than 116 days), malposition of fetuses, discharge of bloody discharges from the vulva, and meconium are not blamed or blamed for weaknesses or 1-2 hours after the sow’s output. There is still no calving and no blame. The sows are suspended for prolonged periods of severe anger, but no litter is difficult to produce.

First, causes of sows dystocia are:

1, improper feeding and management. The sows have poor nutrition and are emaciated, or the sows are too obese, lack of exercise, and lack of green feed;

2, the pig is too old. Caused the uterus contraction of the sow to be weak, weak pull-out force, and sometimes began to deliver well, and later left 3-4 fetuses unable to discharge;

3, fetal position reasons. The fetal position is not correct, the fetal porcine malformation and the two fetuses are wedged in the birth canal at the same time, so that the fetus cannot be successfully delivered.

4, poor sow development. Premature breeding and other reasons, sow pelvic stenosis, narrow birth canal, affect fetal pig output.

Second, the symptoms of sows dystocia

1. Exceeded the production period of 116 days, no signs of production occurred;

2. The sows are pregnant and have reached the end of their gestational period. There is a phenomenon of childbirth, but the piglets cannot be produced successfully.

3, due to childbirth and difficult labor, the performance of non-nuclear responsibility, less power, long after the start of childbirth can not produce fetuses.

4. Dystocia caused by fetal abnormalities, often the birth canal opening conditions and delivery performance are normal, but no fetal pig output. Due to the narrow birth canal, the performance of the vulva is not enough to open and relax, and the delivery force is normal, but only a few fetal fluids are discharged, but no fetus can be produced.

If the labor is too long and the treatment is improper, the sow will be weak, the heartbeat will be weakened, the breath will be slight, and the serious sow will die within 2 to 3 days.

Third, prevention and treatment

1. Prevention: Pay attention to the selection and selection to avoid inbreeding. Sows must be mated after 10 months of age. Pay attention to proper movement and feeding of appropriate amount of green feed and mineral feed to pregnant sows, and a reasonable mix of feeds to prevent sows from becoming overweight and wasted. When the sow comes into production, it must be guarded by a special person so that it can be discovered as soon as possible when dystocia occurs and promptly treated.

2. Treatment and disposal

(1) More than 116 days of production: Sows are given intramuscular injection of 2 mg/litre of sodium clozole, and they usually give birth on the second day. If there is no delivery on the next day, then intramuscular injection of 2m1/head.

(2) Weakness of delivery: first intramuscular injection of sodium clodeproline sodium 2ml/head, then intramuscular injection of oxytocin 20 units/head every 30-40 minutes.

(3) Malposition of fetus: When the fetal position is not correct, midwifery can be performed. Midwifery methods are: disinfection of vulva, short nails, wash hands and arms with soapy water, and disinfect with 2% iodine. With your palms facing down with your fingers, slowly enter the birth canal, correct the position of the fetus and grab the pig's feet or upper collar. Pull the piglets outwards slightly with the sow's responsibilities. Action should be light, do not force to pull out, pull out piglets should promptly help piglets breath, postpartum treatment of sows with antibiotics for 3 days, it is best to intrauterine injection of anti-infective drugs.

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