Periods generally refer to menstruation, and it is possible that a woman’s menstruation when breastfeeding for 25 days after giving birth to a baby may be normal, or it may be caused by bad menstruation. 1. Although most women who breastfeed their babies after giving birth will have their menstrual period later, there are a few women who have been breastfeeding their babies but have their menstrual period earlier. Individuals who have a short menstrual cycle may have their menstrual period when they are breastfeeding for 25 days after giving birth, which may also be normal. 2. After giving birth, there will be discharge from the vagina, and in most cases, it takes 2 to 4 weeks for the discharge to clear up gradually. Bleeding in the vagina 25 days after delivery is not necessarily menstruation, but may be mistaken for menstruation. Therefore, if vaginal bleeding occurs after delivery, it is recommended to seek medical advice from your doctor in order to clarify the exact cause of the bleeding.