The sow is due 7 days too late? The veterinarian taught you how to avoid the death of piglets!

Generally speaking, the average gestation period of sows is 114 days. The gestation period of sows varies according to different pig breeds, but the individual difference is more obvious. The postponement of sow delivery is an abnormal production phenomenon that often occurs in the process of pig production. the emergence of this phenomenon will more or less affect the result of sow birth, resulting in varying degrees of economic losses.

1. the reasons for the delay of sow delivery.

The postponement of sow delivery is an abnormal production phenomenon that often occurs in the process of pig production. if the sow is produced 4 days later than the average delivery period, the piglets are larger and have a long coat after birth, but the nutrition is not necessarily good and the vitality will be affected. If the delivery is later than 7 days, there is likely to be a full litter of stillbirths, or even because of stillbirth, the delivery period will continue to be postponed until manual intervention. Due to the different environment, the reasons for the delay of delivery in sows are also different. the most likely reason is that they are affected by high temperature or infected with porcine parvovirus, Japanese encephalitis virus and porcine blue ear virus, resulting in fetal death. After the due date, the fetus has no vitality and can not stimulate the uterus, so that the body's response to pregnancy is not strong, thus causing the delivery of sows to be postponed.

2. It is necessary to understand the method of calculating the due date of pregnant sows.

Sows should record the date of mating and the breed and number of boars when mating. As soon as it is determined that the sow is pregnant, it is necessary to calculate the expected delivery date, so as to facilitate feeding and management and prepare for delivery. The gestation period of sows is generally 110-118 days, with an average of 114 days. Therefore, the expected delivery date of sows is calculated according to 114 days, which can be calculated by the following methods:

The sow is due 7 days too late? The veterinarian taught you how to avoid the death of piglets!

(1) three, three and three methods. In order to facilitate memory, the pregnancy period of sows can be recorded as 3 months, 3 weeks and 3 days.

(2) the method of adding 3 per month and 20 per day. That is, adding 3 months to the sow breeding month and 20 days to the mating day, the date obtained is the expected birth date of the sow.

3. Clinical symptoms of sows exceeding the due date.

Generally speaking, the diet is depressed, the frequency of micturition is reduced, and the food intake is gradually reduced to refuse to eat. I can't afford to lie on the floor and my body temperature is not high. Cold in both ears, rapid heartbeat, dyspnea, conjunctival congestion, dry stool, less red and yellow urine.

4. How to correctly deal with the problem of delayed delivery of sows

(1) in management, parturient sows should be treated like pregnant women: prenatal observation of parturient sows should be carried out every day to check the fetal movement of embryos. Special attention should be paid to the feed intake of prenatal sows, which is a direct response to the health status of sows. If you stop eating a few days before delivery, the sow may have a cold or fever and need to be diagnosed and treated in time. If it has nothing to do with the disease, it is likely to be a sign of labor and needs to be screened. However, according to the relevant data, if you stop eating for 2 days before delivery, the process of giving birth will be prolonged and the incidence of dystocia will increase.

(2) reflect on the breeding records: whether the breeding situation is really accurately recorded? Have you ever returned to love? When it is confirmed that the mating records are accurate, active measures can be taken to promote sow delivery. Chloroprostol is recommended instead of oxytocin. Oxytocin should be used during sows giving birth, and pay attention to the use of appropriate doses.

(3) the conventional measure of actively adjusting the delivery time of sows is adopted in production, which is mainly used for sows to give birth during the day or at the same time.

The drug used is Chloroprostol. The 113-day parturition during pregnancy is treated at 10:00 every day, and sows usually give birth after 20 Mel 30 hours, which encourages 85% of sows to give birth during the day, easy for breeders to care for and prevent stillbirth and dystocia.

(4) due to many causes of dead fetal mummies and insufficient nutrition, sows ate moldy feed, and sows were infected with Japanese encephalitis, parvovirus, pseudorabies, classical swine fever and so on, so the feed quality should be strictly controlled. do a good job in the comprehensive prevention and treatment of the above-mentioned diseases.

(5) it is necessary to find out the delay of delivery as soon as possible, and it is also a positive and effective way to reduce the loss. If the breast is found to be well developed in the early stage, and the phenomenon of returning milk occurs before the due date, it is necessary to pay special attention and take necessary rescue measures.