A recent study published in the journal Nature Aging suggests that pregnancy may accelerate biological aging in women by more than five years. Conducted by researchers from Northwestern University and other institutions, the study analyzed DNA methylation patterns in blood samples from thousands of women. It found a significant association between pregnancy and an accelerated epigenetic clock—a biomarker that estimates biological age based on chemical modifications (such as methylation) to DNA, offering a more accurate measure of physiological aging than chronological age alone.The research indicates that each full-term pregnancy is linked to an average increase of about 5.2 years in biological age. However, this accelerated aging appears partially reversible: within approximately six months after childbirth, some women showed a reduction in their biological age, suggesting the body has a capacity for recovery. Scientists hypothesize that the intense physiological demands of pregnancy—such as nutrient allocation to the fetus, immune system modulation, and dramatic hormonal shifts—may drive this aging effect.Experts stress that these findings do not diminish the value of pregnancy but rather deepen our understanding of its long-term impact on maternal health. This insight could eventually lead to targeted interventions aimed at reducing the physiological burden of pregnancy and supporting postpartum recovery.
近日，一项发表于《自然·衰老》期刊的研究指出，怀孕可能使女性的生物学年龄加速老化超过5岁。该研究由美国西北大学等机构的科学家团队开展，通过对数千名女性血液样本中的DNA甲基化模式进行分析，发现怀孕与表观遗传时钟显著加快相关。表观遗传时钟是一种基于DNA化学修饰（如甲基化）来估算生物年龄的工具，能更准确反映身体实际老化程度，而非仅依据出生年份。研究显示，每经历一次完整妊娠，女性的生物年龄平均增加约5.2岁。不过值得注意的是，这种加速老化在分娩后数月内部分可逆——产后6个月左右，部分女性的生物年龄有所回落，表明身体具备一定的恢复能力。研究人员推测，怀孕期间母体需为胎儿提供大量营养、承受免疫系统调整及激素剧烈波动，这些生理压力可能是导致加速老化的关键因素。专家强调，这一发现并非否定怀孕的价值，而是帮助人们更全面理解妊娠对女性健康的长期影响。未来或可据此开发针对性干预措施，减轻孕期对母体的负担，促进产后恢复。
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