The sequelae of abortion include cervical and uterine cavity adhesions, pelvic inflammatory disease, peritonitis, endometriosis, menstrual disorders and secondary infertility, etc. The specific causes and treatments are as follows: 1. Cervical and uterine cavity adhesions: commonly seen during abortion surgery, which can damage the basal layer of the endometrium, resulting in postoperative sequelae such as low menstrual flow, cervical adhesions and uterine cavity adhesions. In this case, it needs to be treated by laparoscopic surgery and at the same time treated with reasonable anti-inflammatory drugs to avoid re-infection leading to adhesions; 2. Pelvic inflammation and peritonitis: during abortion, if the bleeding time is long and there is residual pregnancy material in the uterus, it may cause uterine cavity infection. The infection may continue to spread to the pelvic and abdominal cavities, with sequelae such as pelvic inflammatory disease and peritonitis, and in severe cases even cause infectious shock. At this time, you need to choose the appropriate antibiotics for anti-infection treatment, such as gentamicin, metronidazole, erythromycin, etc.; 3. Endometriosis: In the abortion process, the main method is to use negative pressure electrical attraction to suck out the early pregnancy products, and the negative pressure attraction may lead to the shedding of endometrium with the peristaltic migration of the fallopian tube to other parts, thus causing endometriosis. In this case, you can choose to take drugs and surgical treatment together, when the pain attack can use analgesic antispasmodic drugs to relieve pain, such as atropine, scopolamine, according to the patient’s age and whether there are fertility requirements to decide the scope of surgical removal; 4, menstrual disorders and secondary infertility: abortion after the human chorionic gonadotropin suddenly disappeared, so that the ovaries can not respond to the anterior pituitary gonadotropin secretion for a while, and thus also menstrual disorders and secondary infertility. As a result, menstrual irregularities or even amenorrhea may also occur. Prolonged absence of menstruation or damage to the uterus may cause secondary infertility and require symptomatic treatment, such as dietary improvement, menstrual regulation, and surgical repair of the uterus.