The permanent contraceptive method that can be used after having a baby is ligation, which is a tubal ligation, because the fallopian tube is the channel for transporting sperm and eggs, as long as the fallopian tube is cut off, there is no way for the eggs to enter the uterine cavity, so that fertilization is not possible, thus achieving the purpose of contraception. Ligation is the most reliable and best method of contraception at present, but it is not 100%, and we have encountered very few patients who became pregnant again after ligation, but the probability is low. If you are having a cesarean section, you can have the ligation operation at the same time during the operation. If you are having a normal delivery, you can have the ligation operation about 3 days after delivery or after 42 days.