Menstruation is irregular during breastfeeding, especially within 6 months after delivery, and some people have less and irregular menstrual periods, so when menstruation comes and stops, it means that the bleeding is less. Because lactation can inhibit ovulation during breastfeeding, menstruation is irregular and there is no need to worry. Generally, menstruation will return to normal 6 months after delivery. However, the time of menstruation is different for each person, some people can not have menstruation until they have been breastfeeding for about 1 year, which is also normal, as long as 2-3 months after weaning, they can have menstruation normally.