Shortening the sow's labor process to reduce the occurrence of stillbirth
The term "dead fetus" as used here refers to the fetus that died during childbirth, and does not include mummified fetuses and black fetuses that were formed before and during the first trimester of pregnancy. The main reason why sows give birth to stillbirth is that sows produce too long during the parturition process. The normal production period is 2.5 hours to 3 hours. Prolonging the birth process will cause the death of the piglets at birth. Because the sows' contraction of the placenta and poor blood flow during parturition caused part of the piglets' placenta to fall off and the umbilical cord breaks. The umbilical piglets must be produced within 5 minutes to 10 minutes. If the sows are prolonged due to various factors, the sows Umbilical piglets have not yet produced output, and piglets will die due to lack of oxygen. According to relevant statistics, the extension of the sow's production process caused the death of the broken umbilicus piglets to account for 80% to 90% of the total stillbirth. Sows have too much body fat, too much prepartum, improper care and management, and epidemics can all contribute to prolonged sows' labour.
First, to prevent sows from giving birth when over-fat or over-weight sows have a full back condition, there is a flat on the line, do not see any bone protruding, in the lumbar vertebrae, behind the ribs and in front of the pelvis should have a lacune, over Fertile sows do not have nests. Therefore, the pregnant sows should do a limited feeding work according to the rules of the growth and development of the fetus and the sow's sensibility 98 days ago. From 100 days of gestation to 3 days before the start of the gestation, the free sows should be fully eaten. This will not only increase the birth weight of the piglet, but also prevent it. Sows are too fat.
Second, sows to pre-feeding in order to reduce the adverse effects of gastrointestinal overload on the litter size, sows 3 days before birth (according to the expected date of birth) began to limit the material limit: the first three Day 3 kg per head per day, 2 kg per head per day on the second day before delivery, 1 kg per head per day on the first day of prenatal day. When the sow is giving birth, the litter size is not fed and 0.5 kg is fed every other day. For example, if sows are farrowing in the morning, the sows will be stopped in the morning, 0.5 kg will be fed in the afternoon, the baby will be born in the afternoon, and will be stopped in the afternoon. The 0.5 kg will be fed in the morning on the 1st day after giving birth and the 0.5 kg will be fed in the afternoon. 2 kilograms per day, 3 kilograms per head per day on the third day after childbirth, and weaning and free feeding 4 days after delivery. Prenatal restriction from more to less, postpartum feeding from less to more to prevent postpartum indigestion of sows.
Third, to prevent prenatal constipation in sows 1 week before and after sows sow, in the feed mix 1% of sodium sulfate and 0.5% rhubarb soda powder, can make the sow fecal soft and moist, is conducive to the smooth flow of defecation.
Fourth, to strengthen the management of pregnant sows, especially the sows in the late pregnancy and the sows in the upper part of the production of sows, pregnant sows limit rearing, especially during late pregnancy sows eat more, increase body heat after eating, body temperature ratio Before eating, it rises by about 0.5°C to reach 39.5°C. When the sow's body temperature stays at this temperature for 102 days to 110 days during pregnancy, the piglet's stillbirth rate rises at the time of delivery. Therefore, when the ambient temperature reaches 30°C or higher, the recommended interval Half-hour cooling of spraying sow breeding sows, the temperature of the sows in the delivery room flushing, reduce the impact of heat stress on the sow. For normal farrowing farrowing homes, quietness should be maintained, especially for first-time sows. When the sow is irritated, massaging the breast can make it quiet, which is of great significance for promoting smooth delivery.
Fifth, do a good job after the birth of piglets to dry the mucus After drying the piglets coat, immediately to the sow breast feeding, through the piglets continue to suck the nipple, can stimulate uterine contractions, not only helps smooth delivery, shorten The labor process is also conducive to milk discharge.
Sixth, do a good job of vaccination work to prevent the sow infection disorders, the sick pigs, especially fever sows to be treated promptly.
VII. Correct use of the oxytocin sows During the delivery process, do not use oxytocin in the case of successful farrowing (outputting 1 piglet within 10 minutes), but when the next piglet is still not produced within 30 minutes, it is recommended that immediate injection 10 international units oxytocin midwifery, such as piglets within 20 minutes after the injection of oxytocin still failed to produce, to check whether the sows are difficult to produce, in order to timely midwifery.
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