Generally, the IUD can be inserted six months after a cesarean section, but there are individual differences. IUD refers to the placement of intrauterine device (IUD), which is the most commonly used safe, effective and simple contraceptive measure for women of childbearing age. Cesarean section is a surgical procedure to terminate a pregnancy, and the uterine scar needs to be completely recovered before an IUD can be used after a Cesarean section, which usually takes about six months after the operation. The possibility of pregnancy should also be ruled out before placing the IUD, but there is some individual variability. After the IUD should pay attention to appropriate rest, avoid strenuous exercise, prohibit bath and sexual intercourse for two weeks, but also follow the doctor’s advice to give metronidazole and other antibiotics to prevent infection treatment. After the IUD, you should also follow the doctor’s instructions to review on time to ensure the effectiveness of IUD contraception. When irregular vaginal bleeding occurs after the IUD, it can be left untreated for the time being, and can be recovered gradually.