When sows are mated, detailed records should be kept of the date of breeding and the species and number of the boars. Once it was concluded that the sow was pregnant, it was necessary to calculate the date of the expected date of production so that it would be easy to raise and manage and prepare for the production. The sow's pregnancy period was 110-120 days, with an average of 114 days. The estimated sow's due date is based on 114 days and can be calculated as follows.
1, 3, 3, 3 methods. In order to facilitate memory, the sow's pregnancy can be recorded as 3 months, 3 weeks and 3 days.
2, plus 3 months of breeding, breeding plus 20 days. That is, add 3 months to the sow mating month, add 20 days to the breeding day, and get the expected date of the technical sow. Examples include mating on March 1st, delivery on June 21st, breeding on March 20th, and delivery on July 10th.
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