Under normal circumstances, when women who have had a vaginal delivery have a medication abortion, it is faster than women who have had a caesarean section or women who have never given birth. This is mainly because the cervix of women who have had a vaginal delivery is relatively loose, so after the medication abortion, it is easier for the gestational sac, the membranes and the blood to pass through the mouth of the cervix to be discharged out of the body. On the contrary, women who have given birth by cesarean section or women who have not given birth before have a relatively tight cervix, so they have to use drugs to soften the cervix, and the degree of softening of the cervix is lower than that of the women who have given birth before, so the medication for abortion in this case is relatively slow. However, the speed of drug abortion is also related to the sensitivity of the patient to the drug, if the patient is not sensitive to the drug, even for women who have had a vaginal delivery, the drug abortion may fail or be slower.