There are two main differences between hospitalization and home birth control: first, during hospitalization, intravenous medication can be used to achieve the effect of birth control, while home birth control is not convenient and unsafe, so most home birth control is achieved through oral medication. The second point is that inpatient fetus preservation can observe the change of condition every day, and if the condition is aggravated during the treatment, the dosage can be adjusted at any time and effective treatment measures can be taken at any time; while in home fetus preservation, we cannot grasp the first-hand information, and we can only take corresponding treatment after the patient has uncomfortable symptoms and goes to the outpatient clinic.