Causes and prevention of sow abortion

There are five main reasons for the mid-term abortion of sows:

First, the cold and warmth is poor. There are four farmers who have sows in the house, the walls are broken, the roof is leaking, and the grass curtains are not covered with wind and cold, resulting in 6 sows within 46 to 70 days after pregnancy. A miscarriage occurred.

Second, it is a serious shortage of nutrients. After the conception, the sow needs to maintain its own nutritional needs, but also to supply nutrients for fetal development and postpartum lactation. This requires that in addition to ensuring the supply of sufficient green and succulent feed, it must also be fed 1 to 1.5 kg per day. Minerals such as corn and appropriate amount of minerals such as bone meal and salt (preferably fed to a comprehensive nutritional feed). At the same time, try to adhere to the "four no feed" - do not feed the mold, deterioration, toxic and irritating feed, do not feed frost and ice frozen feed , do not feed more feed with silt and weed, do not feed cold water and dirty water. In the survey, 6 sows of 4 households were pregnant, and because they had no money to buy concentrates, they mainly used roughage such as rice bran, bran and vegetable feet, which caused serious lack of nutrition of the sows and extremely weak constitution. After pregnancy, 40~ 54 days have been aborted.

Third, it is the daily management of the sows to do single-round breeding, flat housing, light, and good ventilation. In the early stage of pregnancy, the embryo has not yet been implanted, and it is in a free state. Special care should be taken to prevent cold whipping, sudden screaming and other strong stimuli. After three months of pregnancy, the fetus has developed greatly. At this time, special attention should be paid to prevent squeezing, slipping, turning sharply, and jumping off the bar. It is best to stop exercising before delivery. In the survey, there were 4 sows 6 litters due to inhomogeneous fall abortion; 3 sows 5 litters due to narrow housing, sow belly was squeezed abortion; 2 sows were suddenly frightened Jumping abortion.

Fourth, if the sows are improperly re-contained, there will be a phenomenon of “fake nests”. Some inexperienced farmers often mistakenly believe that they are not matched with seeds and are reassorted, which often destroys the sow's uterine plug and causes miscarriage. Abortion was caused by four sows in the investigation.

Fifth, it is the sow's own diseased sows suffering from acute infectious diseases or reproductive system diseases during pregnancy, can also lead to miscarriage. In the survey, two sows were infected with erysipelas two months after pregnancy, and three sows suffered from chronic metritis and had a miscarriage. After the majority of pig farmers understand the main cause of sow abortion, they should always pay attention to the daily management. When the sows are found to have white mucus in the vagina before pregnancy, they are uneasy, repeatedly reprimanded, and look back at the abdomen from time to time. When the breast is swollen in the late pregnancy, the fetal movement is not limited, the vulva is swollen, the cervix is ​​not open, and the fetal water is discharged, or the mechanical trauma such as squeezing or slipping may cause miscarriage, the veterinarian should be asked to perform the fetus. Each sow can be intramuscularly injected with progesterone 20 to 35 mg once every other day for 3 to 5 days, and combined with intramuscular vitamin E and sedative. If the fetus fails, the cervix has opened, and the fetus has died or even become corrupted. It can be intramuscularly injected with 40-80 mg of diethylstilbestrol, and then with intramuscular injection of oxytocin 30-60 international units to promote the early discharge of stillbirth. Make sure the sow is safe. If the dead fetus is corrupted and causes sow vaginitis or metritis, the vagina and uterine cavity must be washed with 0.1% potassium permanganate or 5% to 10% saline, and then inserted into the oxytetracycline capsule.