The number of cesarean sections should be controlled within 3 times, because multiple cesarean sections have higher risks and more complications, such as scar pregnancy, thinning of uterine wall, damage to pelvic floor muscle and pelvis, etc. 1, scar pregnancy: scar pregnancy refers to women who have a history of cesarean section and when they get pregnant again, the embryo will be deposited in the cesarean section scar of the uterus. Scar pregnancy can lead to hemorrhage during abortion or curettage. In addition, scar pregnancy can have different clinical regressions. If the embryo sac is endogenous, it will grow towards the uterine cavity and can eventually be delivered at full term, but at the same time, there is also the risk of placenta praevia, which will increase the likelihood of miscarriage. If the embryo sac is exogenous, it will grow towards the bladder and can develop into a menacing placenta praevia, which can also lead to uterine rupture in severe cases; 2. Thinning of uterine wall: with the increase of cesarean sections, it will lead to thinner and thinner uterine wall, which will increase the risk during the operation, and at the same time increase the probability of preterm labor, which will seriously threaten the lives of the pregnant women and the babies. Therefore, it is recommended that women who want to prepare for pregnancy after cesarean section should go to the hospital to improve the eugenics and other related examinations, and prepare for pregnancy under the guidance of the doctor. If you do not plan to get pregnant after cesarean section, you should pay attention to good contraceptive measures, such as wearing condoms, placing intrauterine devices, etc., to avoid unnecessary harm to the body caused by unwanted pregnancy.