It takes one month to have intercourse after a medical abortion because the vaginal bleeding time is longer than that of an abortion, usually 15-20 days before the abortion is completely clean. In other words, the endometrium is not repaired at the time of bleeding, so if you have intercourse during this period, pathogenic bacteria will enter the endometrium directly, resulting in inflammation of the endometrium, and may also enter the pelvic cavity along the fallopian tubes and cause chronic inflammation of the pelvic cavity, resulting in adhesion of the fallopian tubes and infertility in the future. In addition, if you have sex before a month after the abortion, you may get pregnant again once ovulation resumes. Therefore, after a medical abortion, it is best to consider having intercourse after 3-7 days of cleanliness after a month of resumption of menstruation.