Studies suggest that pregnancy can temporarily raise estimates of biological age—a way of assessing age-related changes in the body using biological measurements rather than years lived. These estimates can partly fall back after birth, suggesting that the changes measured during pregnancy do not necessarily persist. Mass General Brigham (source, opens in new tab)
Mass General BrighamResearch Spotlight: Postpartum recovery window may play a critical role in maternal aging and long-term healthOpen source (opens in new tab)
Building on this observed pattern of partial recovery after birth, a scientific review by Stephen M. Albright and Jesse R. Poganik, published in Trends in Endocrinology & Metabolism, considers what might happen if another pregnancy begins before that recovery is complete. The authors propose that the time available to recover between pregnancies could help explain longer-term patterns in mothers’ biological-age measurements.
The review brings together existing research rather than collecting new data, and this hypothesis has not been directly tested. It does not establish that closely spaced pregnancies cause lasting biological ageing, or that the short-term changes in these measurements predict a mother’s later health.
The studies discussed in the review used several approaches, including brain imaging, blood-based scores and DNA methylation. Methylation refers to chemical tags on DNA whose patterns can be used in some biological-age estimates. These are different ways of tracking biological change; a rise in an age estimate is not, by itself, proof of lasting damage.
Recovery in these measurements may take months or longer and may vary with factors such as pre-pregnancy weight, breastfeeding and possibly sleep. This is why the authors suggest looking beyond the number of pregnancies a woman has had to consider the recovery time between them.
Testing the idea would require following women over time to examine how biological-age measurements change between pregnancies and whether those patterns relate to later health. The review does not identify a harmful interval between pregnancies or provide a basis for new advice on pregnancy spacing.
- Mass General Brigham · InstitutionResearch Spotlight: Postpartum recovery window may play a critical role in maternal aging and long-term healthmassgeneralbrigham.org · opens in new tab
