Xu Yongyue, Luoqiao Town, Funing County came to the telephone to report that one sow of his family had been pregnant for 118 days and had not yet produced. He also saw the piglets move in the sow's belly two days ago. Now he has not felt fetal movement for two consecutive days. The sow has already produced more than a dozen children. He asked if oxytocin could be injected now.
According to researcher Yang Shuwen, a swine expert from the Animal Husbandry Institute of the Jiangsu Academy of Agricultural Sciences, the sows have passed the expected date of production for a long period of time. They have not been able to touch the fetus for two days in a row. It is estimated that the piglets are dead and must be taken immediately to promote the discharge of stillbirths. , otherwise it will cause sow endometritis, reproductive function decline, resulting in repeated infertility.
Delayed delivery of sows may be due to high temperatures or infection with porcine parvovirus, Japanese encephalitis virus, and blue-ear virus disease, causing fetal death. After the due date, due to the lack of vitality of the fetus, the uterus cannot be stimulated, and the body's response to pregnancy is not strong, causing the sows to delay delivery.
The commonly used drug to promote sow production is oxytocin, also known as uterine contractor. Oxytocin is a hormone produced by the hypothalamus and secreted by the pituitary gland. It has many functions. The two most well-known functions are the promotion of breast milk and acceleration of uterine contractions. The use of small doses can make rhythmic contractions of the uterus at the end of pregnancy, so that the smooth muscle relaxation of the cervix, promote smooth fetal output. Oxytocin was used for induction of labor and production. The first use of 2.5-5 units was performed by slowly instilling 500 ml of 5% glucose solution. If it does not work after the first use, you can increase the dose and use it again.
Zhang Zhihui, Pan Rongliang, and Zhang Xuekun from Anjiazhen Veterinary Station and Weicun Town Veterinary Station in Changzhou City, Changzhou City used chloroprecuronol to treat 300 sows in late veterinary clinics and achieved satisfactory results. They had intramuscular injections of cloprostenol in sows who did not give birth 7 days after the expected date of delivery. They were treated in two cases: (1) One sow (2 ml, 0.2mg cloprostenol) was used for the untreated sow; (2) Two sows that did not respond to treatment with other drugs (oxytocin or pituitrin) had no effect. As a result, the treated sows were able to give birth within 48 hours and could continue to estrus and become pregnant.
In addition, the sow of Xu Yongyue's family has already produced more than 10 fetal piglets, and the longevity is too long. General sows born after 8 tires should be eliminated later, otherwise easily lead to dystocia, stillbirth, miscarriage and other conditions.
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