Usually menstruation comes 1-3 months after weaning, the exact time is related to factors such as how fast or slow the ovarian function recovers after delivery, and there are some individual differences. Each woman’s body condition is different. If her body recovers well after delivery, she can resume normal menstruation 1 month after delivery; most of them resume menstruation around 4-6 months after delivery, after milk secretion decreases as the baby adds complementary foods. Secondly, a small number of women gradually resume menstruation only after weaning. The speed of resumption of menstruation, i.e., the speed of recovery of ovarian function after delivery, is mainly related to emotions, secretion of lactogen and the level of estrogen and progesterone. If menstruation does not resume after 3 months of weaning, you can go to the hospital for ultrasonography and sex hormone level check, and give medication if necessary. Therefore, after delivery, pay attention to strengthening nutrition, relaxing, not overworking and staying up as little as possible. Especially women with complications such as gestational hypertension, diabetes and anemia should pay more attention so as not to affect their body recovery.