Generally speaking, after a medication abortion, menstruation may come in about 30-35 days after the medication abortion, although some women with good physical condition may also have menstruation in about 27 days. Although the ovarian function will gradually recover after medication abortion, there may be irregular menstruation, with different duration and amount of menstruation. At the same time, medication abortion also has certain risks, such as abortion failure, intrauterine residue and so on. Therefore, it is recommended that contraceptive measures should be taken in the absence of preparation for pregnancy, and at the same time, if there is any abnormality in menstruation after medication abortion, then it is recommended to consult a doctor in time.