What are the signs of sows before giving birth? What preparations need to be made? What are the techniques for reducing stillbirth?

Among pigs, female pigs of any age who have given birth are called sows. Some sows eat raw and half-cooked food, some eat cooked food, and some eat raw food. So what are the signs of sows before giving birth? What preparations need to be made? What are the techniques for reducing stillbirth? Let's take a look at it.

What are the signs of sows before giving birth?

When the sow is nearing delivery, the vulva of the sow is soft, the color also changes from red to purple, the breast bank is raised, and the breast is swollen and shiny. Three days before delivery, the sow moves steadily and cautiously, the nipple can squeeze out the milk, and the breast bank is a little fever. the breasts are separated and straight in the shape of "eight". Suddenly stop eating, nervous, lying from time to time, hit the door or trough with the head, pull small and soft feces, urinate frequently, gently pinch nipples can squeeze out thick milk, it means that labor is imminent.

What preparations do sows need to make before giving birth?

1. Delivery appliances and medicines: birth record form, bath towels, scissors, iodine tincture, liquid paraffin or soap, ligature line, scale.

two。 Scrub the sows' breasts and vaginas with 2% to 5% warm sur water, 0.1% bromogeramine or 0.1% potassium permanganate.

3. The obese sows were fed on the day of delivery and were not fed on the day of parturition.

4. In order to induce parturition, the sows were injected with 0.1 mg Chloroprostol (diluted with normal saline) one day before the expected delivery period, so that the sows were delivered at the same time and easy to manage.

5. Before giving birth, the manager should install the heating lamps in advance and raise the local temperature. The place where the piglet was born should be kept at 33-35 ℃.

What are the techniques for reducing stillbirth in sows?

1. Strengthen the feeding and management in production, control the body condition of sows during delivery, and prevent being too fat or too thin. In the actual delivery, the body condition of the sow should be full on the back, with a flat upper line, without any bone protruding, below the lumbar vertebrae, behind the ribs and in front of the pelvis, and there should be no lacunae in the fat sows. Therefore, before 98 days, pregnant sows should be restricted according to the law of fetal growth and development and fat status of sows, and feed freely from 100 days of pregnancy to 3 days before birth, which can not only increase the birth weight of piglets, but also prevent sows from being overweight.

two。 Sows must be limited before feeding, that is, prenatal feed restrictions from more to less, postpartum feeding from less to more, in order to prevent postpartum indigestion of sows. In order to reduce the adverse effects of overweight gastrointestinal burden on litter, sows should begin feed restriction 3 days before parturition (whichever is due). The feed restriction standard is: 3 kg per head per day on the 3rd day before delivery, 2 kg per day on the second day of prenatal birth, 1 kg per day on the first day of prenatal birth, and 0.5 kg every other day during parturition, such as sows giving birth in the morning and stopping feeding in the morning. Feed 0.5kg in the afternoon, give birth in the afternoon, stop feeding in the afternoon, feed 0.5kg in the morning on the first day after delivery, 0.5kg in the afternoon, 2kg per head per day on the second day after delivery, 3kg per day on the third day after delivery, and 4 days after delivery-weaning is free to eat. That is, prenatal feed restriction from more to less, postpartum feeding from less to more, in order to prevent postpartum indigestion in sows.

3. Prevent sows from prenatal constipation. It is suggested that 1% sodium sulfate and 0.5% rhubarb soda powder should be mixed into the feed one week before and after delivery of sows, which can make sow feces soft and moist, which is conducive to smooth defecation. It is better for pig farms with conditions to use lactation.

4. It is necessary to strengthen the heat prevention and cooling work of pregnant sows in summer. Especially for sows in late pregnancy and parturient sows in delivery bed, the pregnant sows are reared in limited positions, with high density and difficulty in heat dissipation, especially in the late stage of pregnancy, the sows eat more food, the body heat increases after feeding, and the body temperature increases by about 0.5 ℃, reaching 39.5 ℃. When the body temperature of sows during pregnancy is maintained for a long time, the stillbirth rate of piglets increases, so when the ambient temperature reaches more than 30 ℃. It is suggested that the pregnant sows in the breeding house should be cooled by spray at an interval of half an hour, and the sows in the delivery room should be flushed to reduce the effect of heat stress on sows.

5. Do a good job of vaccination, prevent reproductive disorders in sows, and treat sick pigs, especially feverish sows in time. In order to reduce the stillbirth rate of piglets during sow delivery, it is necessary to strengthen feeding management in production and give priority to prevention.

6. Keep quiet in the litter. For the delivery house that is giving birth, it should be kept as quiet as possible, especially for first-time sows. When sows are restless, breast massage can calm them down, which is very meaningful to promote smooth delivery.

7. Immediately after birth, the piglets were placed next to the sows' breasts for lactation. After drying the mucus and drying the coat, the piglets should be fed immediately next to the sows' breasts. By sucking the nipples, the piglets can stimulate the hypothalamus of the sows to secrete oxytocin and cause uterine contraction, which is not only conducive to smooth delivery and shorten the stage of labor, but also conducive to milk excretion.