Before abortion, the doctor will carry out the relevant complications and surgical risks of the explanation, the specific hazards are as follows: 1, the emergence of uterine perforation; 2, part of the pregnancy can be residual, poor uterine contraction or poor repair of the endometrium, caused by vaginal bleeding for a long time, easy to secondary infections, such as simple endometritis infections or pelvic infections, poorly handled at a later stage, can cause chronic inflammation of the fallopian tubes, resulting in chronic pelvic pain, affecting the re-conception of the pregnancy, there can be infertility, the risk of ectopic pregnancy in the distant future; 3, some patients undergo surgery, the uterus endothelial repair poorly, the formation of scar adhesion, which can affect the menstrual period, manifesting itself as a delay in the menstruation or cyclical abdominal pain, and so on.