Ligation is a sterilization procedure that surgically cuts off the channel that carries eggs and sperm to prevent eggs and sperm from combining with each other, which can achieve the purpose of avoiding conception. It is mainly used for women and men who have no need to have children, or women and men who already have children and have no intention to continue having children. 1. Female ligation: The main purpose of female ligation is to cut off both fallopian tubes through surgery, so that sperm and eggs cannot meet and combine through the tubes. The surgery is traumatic to the body, so it is necessary to pay attention to post-operative care and require a certain recovery period before the body can recover; 2. Male ligation: male ligation is mainly performed by surgically cutting off the vas deferens on both sides, destroying the integrity of the vas deferens, so that sperm cannot be transported through the vas deferens when sex occurs, achieving the effect of contraception. Compared with female ligation, male ligation is a simpler procedure, less harmful to the body, and the body recovers faster after surgery. In general, ligation should be performed voluntarily by the patient and should be considered clearly before ligation, so as to avoid having ligation on impulse, because it will be impossible to have children after ligation. If you have fertility requirements after ligation, you need to have a tubal and vasectomy reversal surgery, but the probability of successful pregnancy after the surgery is not 100% and there is a certain risk. Therefore, if you do not need to have children for the time being, but you are not sure whether to continue having children in the future, you can also use condoms and oral contraceptives to prevent pregnancy.