It is also normal to have a period 13 days after the abortion. The prerequisite is that ultrasound and blood HCG tests are needed to rule out whether there is any residual possibility. Generally speaking, it is normal to have menstruation within 20 to 40 days after an abortion, but this varies from person to person. If a woman’s body is in good physical condition and recovers quickly, she may have menstruation within 20 days. In general, the menstrual cycle is regulated by the hypothalamus-pituitary-ovarian system and the endometrium, and as long as these functions gradually return to normal, it means that menstruation will gradually resume. After the abortion surgery, patients need to observe the vaginal bleeding situation, but also need to carry out regular re-examination, to rule out whether there is a residual possibility, if the examination results are normal, then usually more recommended to supplement good nutrition, to help the body to recover. If there is any discomfort after the abortion, it is recommended to consult a doctor in time for symptomatic treatment.