The best time to have a cesarean section for a second pregnancy is around 39 weeks, but it needs to be chosen in the context of your own situation. Second child caesarean section is suitable for women who are expecting a baby at around 39 weeks of pregnancy, when the fetus has fully matured and the survival rate after birth is high. However, if the pregnant woman has other comorbidities, the timing of cesarean section will be chosen according to the specific situation. If the cesarean section is performed too early, the fetus is not fully mature, affecting the survival rate of the fetus. If the cesarean section is performed too late, uterine rupture and other phenomena may occur. Pregnant women with other comorbidities may be terminated early, for example, if central placenta previa occurs during pregnancy it may be terminated at 37 weeks of gestation. Or in combination with severe pre-eclampsia, the pregnancy may be terminated at 34 weeks. During pregnancy, it is necessary to go to the hospital for regular checkups, including fetal heartbeat monitoring, ultrasound, etc., according to the development of the embryo and then combined with the doctor’s advice to decide the specific time of delivery, to avoid the fetus from being affected.