It is very common for women to experience irregular menstruation after weaning. The main reason for this is that during pregnancy and childbirth and during breastfeeding, the hormone levels in the body change, which affects the normalcy and cycle of menstruation. Most of the women will gradually normalize their periods within a few months or six months, and some may recover after a year. During breastfeeding, the pituitary gland secretes a hormone called prolactin, which can inhibit the secretion of sex hormones, and after weaning, the secretion of prolactin will become less and less, and the recovery of sex hormones will take some time. If you have irregular periods for a long time, it is recommended to go to the hospital for further examination to see if there are other organic lesions or hormonal abnormalities in your own hormone level.