Drug abortion is a widely used method of early pregnancy termination in clinical practice. The advantages of drug abortion are safety, high efficiency, no need for surgery, and does not affect fertility, etc. However, this method is not suitable for all women who are ready to abort. 2. good physical condition and no contraindications, including but not limited to liver and kidney insufficiency, chronic diseases, benign and malignant tumors, heart disease, gastrointestinal disorders, blood diseases, thrombotic diseases, hypertension, anemia, glaucoma, asthma, allergies, endocrine diseases, abnormal liver and kidney functions, etc., as judged by the doctor; 3. not carrying a functional birth control device, not having undergone glucose Corticosteroid treatment, and usually non-smokers or less smokers and non-alcoholics; 4, people who are not suitable for negative pressure aspiration, including a history of uterine perforation, pelvic and spinal limb deformities that prevent bladder amputation, a history of more than 3 abortions or a cesarean section within 6 months, a history of abortion, and even uterine position deformities such as double uterus or stump horn uterus. In addition, women should go to the hospital for relevant examination before abortion, and then take the medicine strictly according to the doctor’s prescription after the doctor confirms that the indications for drug abortion are met. If there is excessive bleeding, timely examination should be conducted and targeted treatment should be provided.