Generally speaking, a medical abortion is possible in a pregnancy of more than one month, provided that the pregnancy is not ectopic. Medical abortion is mainly aimed at intrauterine pregnancies within 49 days of conception, when the chorionic cells are most sensitive to the drug and have a higher success rate. Usually, when the pregnancy is more than one month old, the gestational sac, which is the first embryonic tissue, can be clearly observed under ultrasound, so that it can be determined whether the pregnancy is normally conceived in the uterine cavity. If the pregnancy is confirmed to be intrauterine and there are no contraindications such as poor liver or kidney function or history of cesarean section, then medical abortion can be performed, but the medication must be taken under the guidance of a doctor at a regular hospital. If the ultrasound indicates that there is residue in the uterine cavity, the vaginal bleeding exceeds the amount of menstruation, and the bleeding lasts for a long time, the uterus should be cleared, and rest should be paid attention to, and no sex should be allowed for one month.