The first child was delivered by cesarean section, the second child is generally chosen to operate as soon as possible after the full thirty-nine weeks, the reason: 1, full thirty-nine weeks before the cesarean section, because the fetus without the birth canal, a small number of fetal fetal lung development is immature, after birth, prone to neonatal respiratory distress syndrome, so it is recommended that the best not in the thirty-nine weeks of pregnancy before the cesarean section. 2, after thirty-nine weeks of pregnancy after a week is the due date, the fetus is easy to start naturally in the week before and after the due date If the contractions start at night, emergency surgery at night, if there are pelvic adhesions, difficulties in entering the abdomen, the need for assistance from a higher doctor, the need for resuscitation after the onset of bleeding, and the lack of doctors and nurses, there is no high safety factor during the day.