If the gestational sac is expelled after the third day of oral medication for medical abortion, that is, misoprostol, this does not necessarily require the uterus to be cleared, but the possibility of not clearing the uterus cannot be completely ruled out. If the gestational sac is completely expelled and there is still a lot of meconium or stasis of blood inside, it is necessary to promote contraction of the uterus by taking oral medication to promote contraction of the uterus and activities to facilitate the expulsion of the residue. The patient needs to review the ultrasound half a month after the sac is expelled, and if the residue is more or accompanied by a high HCG, it needs to be cleared. In addition, there is a possibility that the gestational sac is not completely expelled and there is a defective gestational sac with partial expulsion. It is necessary to review the ultrasound in 7-10 days and if the residual blood flow signal inside is richer or if the HCG is abnormally high, it is also necessary to clear the uterus.