Menopause and Biological Aging Linked in Large Review

Meta-Analysis Connects Menopause and Biological Aging

Earlier menopause correlates with faster biological aging as measured by cellular chemical markers, according to a study published in Mechanisms of Ageing and Development.

Investigators led by the Yong Loo Lin School of Medicine at the National University of Singapore (NUS Medicine) examined data from 29 previously published studies involving 550,550 women. The analysis evaluated how menopause and biological aging intersect alongside pregnancy history and birth outcomes.

The authors examined biological aging using DNA methylation (DNAm) clocks. These molecular tools assess chemical marks that accumulate on human DNA over chronological time.

Epigenetic Clocks Measure Epigenetic Age Acceleration

DNA methylation clocks calculate epigenetic age acceleration (EAA), which indicates whether an individual appears biologically older or younger than chronological age. This metric does not mean that every organ or tissue system ages at an identical rate.

Across the pooled data, earlier menopause showed one of the clearest links to higher EAA. In a subset meta-analysis of 5,920 women, each one-year earlier age at menopause corresponded to approximately 0.08 years, or about one month, of greater EAA on the GrimAge clock.

The investigators documented similar associations using two other measurement tools, the Horvath1Age and PhenoAge clocks.

Pregnancy History Shows Variable Associations across Clocks

Reproductive history beyond menopause also showed links to biological markers, though results differed depending on the specific clock used. Using the PhenoAge clock, each additional pregnancy or delivery was associated with roughly 0.13 years, or 1.6 months, of higher EAA.

The association appeared slightly stronger when researchers examined deliveries alone rather than total pregnancies. In contrast, researchers observed no consistent association between the age at a woman's first menstrual period and biological age acceleration.

Biological Aging during Pregnancy Correlates with Preterm Birth

The review identified a preliminary connection between biological age acceleration during pregnancy and earlier deliveries. In one study of 163 women, each additional year of GrimAge acceleration during pregnancy was linked to 11 percent higher odds of delivery before 37 weeks.

The same study noted 13 percent higher odds of birth before 34 weeks and 18 percent higher odds before 28 weeks. Other reviewed studies also linked elevated biological age during pregnancy with spontaneous preterm delivery.

Evaluating Menopause and Biological Aging through Clinical Discussion

The review demonstrates statistical associations rather than direct cause-and-effect relationships. Most included studies relied on cross-sectional designs, which capture data at a single point in time.

External variables may also explain these differences, including smoking, socioeconomic circumstances, body mass index (BMI), and preexisting health conditions. Larger longitudinal studies that follow women over decades are needed to establish whether these molecular markers predict specific clinical diseases.

Women who want to address long-term metabolic health or cardiovascular risk after reproductive changes can consult their clinician about menopause and biological aging.