What should be done about dystocia in sows?

Dystocia in sows is that during childbirth or miscarriage, sows cannot naturally give birth to the fetus. What should I do when the sow is in dystocia? First of all, we need to understand the causes of dystocia in sows.

The causes of dystocia in sows

The main results are as follows: 1. Due to improper feeding and management, poor nutrition of sows, weak physique, or overweight sows, lack of exercise, lack of green feed, old pigs, too many fetal pigs, etc., the uterine contraction of sows is weak, the delivery force is weak, and sometimes the delivery is smooth at the beginning of parturition. Later, 3 or 4 fetal pigs were unable to be excreted.

2. The fetal pig is too large, the fetal position is not correct, the fetal pig is deformed and two fetal pigs are wedged into the birth canal at the same time, so that the fetal pig can not be delivered smoothly.

3. Due to the reasons of sow dysplasia and early mating, the pelvis of sows is narrow and the birth canal is narrow, which affects the output of fetal pigs.

Symptoms of dystocia in sows

The sow is pregnant and has reached the parturition period, there is a phenomenon of delivery, such as responsibility, but can not successfully produce piglets. Due to the delivery of weak dystocia, the performance of the number of hard work is less, the strength is weak, can not produce fetal pigs for a long time after the beginning of delivery. Due to fetal abnormal dystocia, often the birth canal opening and delivery force are normal, but there is no fetal pig production. Due to the narrow birth canal of dystocia, the performance of vaginal relaxation and opening is not enough, the delivery force is normal, but only some fetal water, and can not produce fetal pigs. If the labor process is too long and improper treatment, the sow will be weak, the heartbeat will be weakened, the breathing will be mild, and the severe sow will die within 2-3 days.

Prevention of dystocia in sows

Pay attention to species selection and mating to avoid inbreeding. Sows can't be bred until they are 10 months old. Pay attention to give pregnant sows proper exercise and feed an appropriate amount of green feed and mineral feed, a reasonable mix of feed to prevent sows from being overweight and emaciated. Sows should be guarded by special personnel when they are about to give birth, so that dystocia can be detected as early as possible and treated in time.

Examination of birth canal of sows

The clinical manifestations of dystocia are not simple. We must find out the main causes of dystocia through birth canal examination and take corresponding treatment measures in order to get a good effect. Birth canal examination is the main method for the diagnosis of dystocia. The sow Baoding, the tail pulled to one side, wash the vulva, tail root, buttocks and nearby with clean water and soap, then rinse and disinfect with 0.1% Lysol water or 0.01% bromogeramine. The examiner cut off his fingernails and exposed his arms for examination. Five fingers slowly extended into the birth canal, feeling whether it is difficult to reach, palpation of the cervix is soft and open, how big, whether the pelvic cavity is narrow, whether there is damage. Whether the fetus can pass. Then reach into the uterus to touch the size, life and death of the fetal pig, whether the posture is normal, whether the two pigs are wedged into the birth canal at the same time, and so on. On the basis of this examination, the treatment plan was decided.

Midwifery measures for dystocia in sows

1. Unarmed traction. Is to use a rope or forceps association assistant to take out the fetal pig through the birth canal. It is suitable for too large fetus, two fetuses wedged into the birth canal at the same time, weak delivery power, hands can touch the fetus, or with the assistance of a fetal cutter to remove malformed fetuses.

2. Drug induced labor. It is suitable for good opening of birth canal, normal fetal posture, simple weak delivery power, especially when most fetal pigs have been produced, only a few fetal pigs are left, while sows are too tired and uterine contraction is weak. Often subcutaneously or intramuscularly injected with posterior pituitary injection or oxytocin 10: 50 units. In order to prevent strong uterine contraction, the injection can be divided into 4 to 5 times, each time at an interval of half an hour. It should be noted that ergot preparation can cause strong uterine contraction, so it should be used with caution in clinic, especially when the fetus is too large or the birth canal is narrow, the abuse of ergot preparation makes it more difficult for the fetus to produce.

3. Laparotomy to get the fetus. It is suitable for pelvic stenosis and incomplete opening of cervix. If the above method is ineffective, caesarean section can be considered.