Most women will have their period about a month after miscarriage. Due to individual differences, the exact time of menstruation after miscarriage is not fixed, and it is normal for some women to have their period a few days earlier or a few days later. However, if you do not have your period 40 days after miscarriage, it is clinically recommended to have the appropriate examination. If you have had sexual intercourse within one month after miscarriage, you should first rule out the possibility of pregnancy. In addition, if pregnancy is ruled out, endocrine disorder may be the cause, and it is recommended to take a blood test for sex hormone six, and then give appropriate treatment according to the results. If the sex hormones are also normal, further examination is recommended to rule out amenorrhea caused by endometrial adhesions and damage to the uterine cavity.