It is not normal to have a period 15 days after a medical abortion. Because medication abortion is an artificial termination of pregnancy, it has an effect on reproductive endocrine and it is not normal to have a period at this time. If vaginal bleeding occurs 15 days after a medical abortion, the most common cause is incomplete abortion, or it may be an infection in the uterine cavity caused by the abortion and inflammation of the endometrium. Therefore, vaginal bleeding occurs. If you see residues in the uterine cavity during the ultrasound, you must immediately remove the uterus and apply antibiotics and medication to promote uterine contraction. If there is no residue in the uterine cavity during the ultrasound, it is possible that the infection is caused by the miscarriage, or it may be due to menstrual disorders and poor recovery of the uterus, which needs to be treated with anti-inflammatory drugs and drugs to promote uterine contraction.