Biological aging research examines pregnancy impact and cellular decline

Recent scientific research is shifting the understanding of aging from a chronological milestone to a biological process defined by the progressive loss of bodily functions. Researchers at Harvard, including Jesse Poganik and Stephen Albright, have proposed a hypothesis regarding maternal health: giving birth in close succession to previous pregnancies may accelerate a mother's biological aging.

Their study, published in Trends in Endocrinology & Metabolism, builds on evidence that biological age increases during pregnancy and physiological stress—such as surgery or severe infection—before partially recovering. This phenomenon has been observed in cohorts across Europe, the United States, and the Philippines.

Separately, medical experts note that biological decline typically begins around age 35, marked by the loss of muscle and bone mass. Modern biology identifies 12 molecular and cellular hallmarks of aging, including the loss of protein synthesis and the shortening of telomeres, which contribute to increased mortality risk.