Complications of sterilization mainly include intestinal adhesion, ectopic pregnancy after ligation and wound infection. 1. Intestinal adhesion: Generally, improper operation of family planning may lead to foreign objects left in the cavity, and the presence of foreign objects in the cavity will lead to intestinal adhesion. 2. Ectopic pregnancy after ligation: it may be due to the detachment of the ligature knot, after the umbrella end of the fallopian tube adsorbs the egg, through the peristaltic function of the cilia of the fallopian tube, it combines with the sperms that are passing through the uterine cavity to reach the position of the fallopian tube, which leads to ectopic pregnancy after ligation. 3. Wound infection: the main causes of infection are not strictly sterilized, not strictly observing the aseptic operation, low resistance of the patient and improper care of the patient. If the patient has complications after sterilization, it is recommended to consult a doctor in time and have the appropriate treatment according to the doctor’s guidance.