Whether or not a painless abortion requires hospitalization and how many days of hospital stay depends on a comprehensive analysis of the patient’s specific situation. Painless abortion is an outpatient procedure. Generally, women who are healthy, normally pregnant and have a gestational sac of less than 10 weeks can go home to recuperate after 1-2 hours of postoperative observation if the procedure goes smoothly, and do not need to be hospitalized. However, if there is more intraoperative bleeding, deep anesthesia, respiratory failure, etc., it is recommended to be hospitalized for 1-2 days for observation, and to be discharged after the blood count and respiratory indicators have stabilized. If a woman has a large gestational sac of more than 10 weeks, she may need to take misoprostol before surgery or use carboprost suppositories to soften the cervix, and the probability of intraoperative bleeding is higher. It is generally recommended to be hospitalized before the painless abortion and use the medication under the guidance of the doctor, and the uterus may need to be cleared after the surgery to prevent intraoperative residuals, and the uterus may still need to be hospitalized for observation after the clearance, which may take 5-7 days, and can be discharged after the uterus contracts well and bleeding stops. If the patient is combined with more serious medical and surgical diseases, it is necessary to make a comprehensive judgment on whether hospitalization is required based on the type of comorbidities, the results of the consultation with various doctors before the operation and the postoperative situation, and the number of days of hospitalization is uncertain. Before the painless abortion, the patient must improve all the examinations and inform the doctor in time when there are comorbidities to avoid increasing the risk of postoperative accidents.