How long does the sow get pregnant and give birth?

In general, sows conceive once in half a year and give birth in about four months, of course, there are special circumstances, such as too many pregnant piglets, which can also lead to dystocia, which usually ends in about 114 days, and it is possible to give birth 3-4 days short of the expected delivery date, so it is necessary to pay attention to the dynamics of sows.

1. The pregnant period of sows. The duration of pregnancy is generally 110 days-120 days, all 114 days, so taking 114 days as the standard pregnancy time for a sow does not rule out the occurrence of special circumstances.

2. Expected delivery date of sows. The difference between the expected delivery date and the expected date of birth by 4 days is considered to be within the normal range. The general calculation method for farmers is to add 4 to the month in which the sow is pregnant, and then subtract 6 from the expected date. Or calculate three months plus three weeks plus three days to calculate the due date.

3. Lactation period of sows. Generally speaking, sows are fed for two months, so it takes a total of 174 days from pregnancy to lactation, which is about half a year, so they can give birth twice a year at most. Although technology can now control the shortening of lactation to one month, it has an impact on subsequent production, so it is not recommended.

4. the empty period of sows. The sow will be in estrus within a week after weaning, this week is to maintain the weight of the sow, because the time of estrus of the sow is related to its weight, so farmers pay attention to its nutrition.