The time for expulsion of the pregnancy sac in spontaneous abortion depends on the strength of the patient’s uterine contractions. Some patients can expel it in minutes after taking the pill, while others take 2-3 hours or even longer. A spontaneous abortion is similar in that if the uterine muscles are contracting well it can be expelled very quickly. If the uterine muscles do not contract well, it can last for a long time, clinically there are patients who last for days or even weeks. For this type of patients, the main thing is to look at the amount of vaginal bleeding, if the amount is particularly heavy, we should be cautious of incomplete abortion, then we should deal with it as soon as possible; if the amount is very small, it may have been cleaned up. Therefore, we do not discuss the length of time in the clinic, the key is to see whether the amount of bleeding will bring more trouble to the patient. In addition to observing the bleeding, if special treatment is needed, the length of time should also be judged according to the bleeding condition. If there is no bleeding or very little bleeding soon, it can be judged that it has been drained, but the final criterion is to use ultrasound as a measure. If the bleeding has been cleared, supportive treatment should be given and the patient should go home for observation. For those who have not had a complete evacuation, so-called incomplete abortion, in order to avoid serious conditions at a later stage, drugs to strengthen uterine contractions, such as oxytocin, can be used to help the recovery as soon as possible; drugs to activate blood circulation and remove blood stasis, such as ShengHua Tang can also be used to help the evacuation. If none of these methods are suitable, the uterus can be purged, i.e., the problem can be solved by a method similar to abortion.