The timing of menstruation after giving birth and breastfeeding is not fixed, and varies slightly from person to person, depending on their body type.
The timing of menstruation after childbirth is related to whether or not you are breastfeeding. For women who are not breastfeeding, they will have their period earlier, within 3 months. For breastfeeding mothers, because they have to breastfeed their children, the time for menstruation may be delayed, around 6 to 12 months.
The time of menstruation after delivery is not really fixed, because every woman’s body is different, and some breastfeeding, some not breastfeeding, will affect the time of menstruation after delivery.