How long it takes to have a period after miscarriage depends on the recovery of the ovaries and uterus, and the previous menstrual cycle, and needs to be analyzed on a case-by-case basis. Miscarriage is divided into spontaneous abortion and induced abortion. No matter which one it is, it will have certain effects on the endometrium, ovarian function and hormone secretion in the body. The repair of the uterine lining after miscarriage requires a certain process, and usually the ovaries resume ovulation after miscarriage in about 2-3 weeks, and menstruation usually comes about 2 weeks after ovulation. Therefore, for patients with normal menstrual cycles, menstruation can resume in about 4-6 weeks after abortion. If the menstrual cycle was irregular in the past or if there is functional uterine bleeding, the recovery time after miscarriage will be affected accordingly and cannot be generalized. If you have not resumed menstruation after miscarriage for more than three months, you should go to the gynecology department of the hospital for ultrasound, hormone six and other related examinations to clarify the specific causes and then carry out the corresponding treatment.