A pig was pregnant for several months and gave birth.

Sow gestation period: 1 10 days-120 days, with an average of 1 14 days. Generally, the expected date of delivery of sows is 1 14 days, and babies born around the expected date of delivery are normal. The simplest way to calculate the due date is the "three-thirds system", that is, three months, three weeks plus three days, and another way is to add four months and subtract six dates.

The lactation period of traditional local sows is two months, plus 1 14 days of pregnancy, a breeding cycle is 174 days, and only two fetuses can be produced in a year; Modern pigs adopt early weaning, which shortens the weaning time to 28 -35 days or even 265,438+0 days. However, at present, with the raising conditions and management level of sows, it is not recommended to adopt early weaning of 265,438+0 days, which is unfavorable to the growth of piglets and the estrus of sows.

Feeding skills of pregnant sows;

Satisfying the supply of nutrients is necessary to ensure the normal growth and development of sows and fetuses. The nutrients obtained by sows from the diet first meet the needs of fetal growth and development, and then supply themselves to store nutrients for breastfeeding. In production, we should not only provide enough energy and protein feed for sows, but also meet their needs for minerals and vitamins.

Pay attention to hygiene, ensure the quality of diet for pregnant sows, and prohibit feeding moldy, frozen, toxic and irritating feed, otherwise it will easily lead to abortion; At the same time, we should pay attention not to change the feed variety and formula casually, feed less green roughage and let sows drink clean water at any time.