Pregnancy accelerates biological aging by up to 5 years, according to Stanford study

A study by Universidade of Stanford, in the Estados Unidos, identified that pregnancy causes a significant acceleration in the epigenetic aging of women. Pesquisadores followed 75 volunteers and found an increase of 1.5 to 5.3 years in biological age during pregnancy. The discovery, published recently, paves the way for new risk markers in prenatal care.

The research measured epigenetic changes in DNA through blood samples collected at the beginning and end of the gestational period. The results indicate that the process takes place in around 200 days, a period much shorter than the equivalent chronological advance.

How epigenetic aging was measured

Scientists used epigenetic clocks, tools that analyze DNA methylation patterns to estimate the biological age of cells. Essas chemical marks change over time and reflect the real functioning of the organism.

In pregnant women, the average advancement was between 1.5 and 5.3 years, while the control group showed a normal range. The difference was shown to be independent of the chronological age of the participants.

Difference between biological and chronological age

Chronological age corresponds to the completed years since birth. Já biological age reflects the functional state of tissues and organs at the molecular level.

Factors such as diet, physical exercise, sleep and stress directly influence this marker. Research has now included pregnancy as an element capable of substantially altering the biological clock.

Relationship with gestational complications

Women who were older biological age in the first trimester had a higher incidence of health problems.

Among the complications observed are:

• Gestational diabetes
• Pregnancy-induced hypertension
• Premature birth
• Fetal growth restriction

Chronological age did not demonstrate a significant correlation with these risks, reinforcing the relevance of the epigenetic marker.

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Potential clinical use of the discovery

Researchers highlight that monitoring epigenetic age can identify high-risk pregnant women with greater accuracy. Early Intervenções, including lifestyle adjustments, could reduce complications.

The team responsible for the study suggests that the marker be incorporated into conventional prenatal care. Testes based on blood samples already exist and can be quickly adapted for this purpose.

Individual variations in the impact of pregnancy

Not all participants showed the same degree of biological acceleration. Fatores as pre-pregnancy body mass index and stress levels influenced the results.

Women with an initially younger biological age tended to show less progress during pregnancy. The phenomenon occurred in all age groups analyzed, between 18 and 50 years old.

Next steps of the research

The team plans longitudinal studies to assess whether accelerated aging continues after birth. Parte of epigenetic changes may be reversible with appropriate postpartum measures.

Other centers are already showing interest in validating the findings in larger and more diverse populations. The goal is to establish reference values ​​for different ethnic groups and geographic regions.

The early identification of pregnant women with significant epigenetic acceleration represents a potential advance in the field of maternal-fetal medicine, allowing personalized preventive strategies based on concrete scientific evidence.