Menstruation may return to its previous regularity after 2 months postpartum, but it depends on different situations, and there are the following common cases: First, women between the ages of 25-30 years old, menstruation can return to its normal regularity only after 1-2 months postpartum, because this kind of women is relatively young, and their physique will be better, and their body’s metabolism as well as their ability to recover will be faster, therefore, menstruation can return to its normality after 1-2 months postpartum. Therefore, menstruation can return to normal in 1-2 months after delivery. Secondly, for women over 30 years old, it takes 2-3 months for menstruation to return to normal after delivery. Thirdly, for women who are not breastfeeding, their menstruation will return to normal faster, usually about 0.5 months. For breastfeeding women, their menstruation will be delayed, but it will return to normal after 3 months.