For women, menstruation usually comes 1~3 months after weaning, so it is normal to have menstruation within 3 months. Due to the female postpartum in the weaning of a relatively short period of time, the body’s prolactin secretion level is still relatively high, so it will also inhibit the function of the ovaries, the body’s estrogen and progesterone levels are relatively low, will not make the uterine lining stripped to menstruation, generally within 3 months of the gradual decline of prolactin levels, the ovarian function gradually return to normal and menstruation. For women, after weaning should also pay attention to maintain a happy mood, appropriate increase in eggs, lean meat and other high-quality protein intake, pay attention to maintain a regular routine, if the weaning half a year after the menstrual period is still not coming, it is recommended to regular hospital gynecology clinic, improve ultrasound, sex hormones and other related examinations, clear cause of the cause of the disease in the doctor’s guidance and active treatment.