Pregnancy and motherhood have an effect on the biological age of women. Women who had a BMI of 30 (moderate obesity) while pregnant had a biological age 0.7 to 1.4 years higher than pregnant women with 23.
Researchers identified maternal body mass index (BMI) and breastfeeding as two factors likely to influence these variations during pregnancy and postpartum. However, additional work will be necessary to “determine whether the reversal in maternal biological age observed three months after childbirth is maintained over time”