Seven months after childbirth, it is relatively common that normal menstruation does not resume. The main reason is that amenorrhea can occur for a short period of time because the uterus and the hormone levels in the body have not yet returned to their non-pregnant state. It takes time for the uterus to recover after childbirth, and the speed of recovery varies from person to person. The hormone levels in the body have not yet returned to the non-pregnant state after delivery, especially in breastfeeding women, where breastfeeding leads to increased lactogen and may cause poor rest, which may also delay the return of menstruation. In the absence of menstruation after delivery, as long as there are no other reproductive endocrine disorders, we can continue to observe and wait, and it is normal to resume normal menstruation within twelve months after delivery. In addition, although normal menstruation is not resumed after delivery, abnormal ovulation may occur and appropriate contraceptive measures should be taken when having sexual intercourse.