The fetus can be delivered by cesarean section 10 days before the expected date of delivery, when the pregnancy week is already full term and the fetus born by cesarean section is a full term baby. At this time, the fetus is about 50cm long and weighs about 3000g, with a mature development, most of the fetuses are above 9.0cm in biparietal diameter, with a full body shape, more subcutaneous fat and pink skin. After birth, the baby cries loudly, has a good sucking ability and has a good survival ability. If a cesarean section is needed because of malposition or other reasons, it can be performed at an optional time. It is not necessary to have a cesarean section until the signs of labor appear, but you can choose the right time and be hospitalized for a cesarean section.