Menstruation occurs 1-2 months after weaning. During this period, prolactin gradually decreases, estrogen and progesterone levels begin to increase, and the endometrium gradually thickens to a certain level, then peels off and bleeds, which is also related to individual physical condition. Some people resume menstruation 2-3 months after normal delivery without waiting for weaning, and some people have menstruation 4-6 months after cesarean section. Some people have vaginal bleeding and dripping for 2-3 months after delivery, which is not real menstruation. Consider that the uterus is poorly restored after delivery, and consider wearing condom for sex to avoid pregnancy after menstruation. If you have sex after weaning and have not had your period for two months, you should first take an early pregnancy test to see if you are pregnant.