1Remove ectoparasites: If sputum or sputum is found in sows, spray it with 2% trichlorfon solution to avoid passing it to piglets after delivery.

2  change feed: sows 10 to 15 days before the birth, gradually changed to lactation diet to prevent postpartum sudden changes in the cause of indigestion and piglet squat.

3Addition and subtraction of feed: If the sow has good sensation and the breast enlargement is obvious, the feeding amount should be gradually reduced 1 week before the birth, and half of the diet should be subtracted from 1 to 2 days before the birth; and the coarse material and the slag should be reduced. Wait for a large volume of feed to avoid stressing the fetus or causing constipation in the prenatal sow to affect delivery. Stop feeding when the symptoms of labor are found, as long as the bean cake bran soup. If the sow has poor sensation and the breasts are dry, it should not only be reduced, but also feed protein prolactin such as bean cake to prevent the sow from having no milk after delivery.

4  moderate exercise: 1 week before the birth should stop the long-distance exercise, instead of moving around the pig house or the playground to avoid abortion or stillbirth caused by fierce catching and colliding.

5 Move into the delivery room: Move the sow into the delivery room 3 to 5 days before the birth, so that it is familiar with and accustomed to the new environment, avoiding the fierce tossing before the birth and causing the fetus to die of suffocation. But don't prematurely move the sow into the delivery room to avoid polluting the production circle and reducing the sow's physical strength.

6 Note: The sow should pay attention to the sow dynamics at the first week before delivery, strengthen the nursing, and prevent accidents such as premature birth and no delivery.