It is normal for a woman to have her period at 12 weeks after giving birth while breastfeeding. There are two main situations when women resume menstruation after childbirth: first, breastfeeding women will resume ovulation and menstruation after 12 weeks, there are many breastfeeding women who will delay until 18 weeks before they can resume normal ovulation and menstruation, there are also many women who will not have normal menstruation after childbirth. This is mainly due to hyperprolactinemia, as the elevated lactogen in women’s bodies can lead to abnormal ovulation cycles in breastfeeding women and prevent them from ovulating and menstruating. Secondly, women who are not breastfeeding will resume menstruation after 6 weeks. The first postpartum period will be heavy and will return to normal later, so don’t worry too much.