The Ovarian Clock: What the Ovaries Reveal About How We Age

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We usually associate the ovaries with fertility, ovulation and menopause. Understandably so. After all, for decades they regulate a key part of our reproductive biology. But this perspective is now too narrow.

The ovaries are among the organs in which aging processes become visible particularly early. This also makes them interesting for longevity research. Anyone who regards the ovaries solely as reproductive organs overlooks their influence on the health of the entire female body. The question is therefore no longer simply: Until what age can a woman become pregnant? It is also: What does the aging of her ovaries reveal about healthy aging overall?

Women are born with a finite supply of follicles - small sacs that each surround an immature egg cell. This supply steadily declines long before menopause. At the same time, the quality of the egg cells and the surrounding tissue changes.

As we age, the cells of the ovaries become less efficient at producing energy in their mitochondria. At the same time, damage to the genetic material can accumulate, while the cells' own repair and recycling processes change. Some cells permanently stop dividing but remain active and can release pro-inflammatory signaling molecules. These senescent cells also affect their surroundings. More connective tissue may accumulate in the tissue and cause hardening, known as fibrosis. The supportive network between the cells, the extracellular matrix, also changes. Ovarian aging is therefore about far more than the loss of egg cells. An entire biological environment ages.

Could the ovaries, which age early, also help determine the pace at which the rest of the body ages? This question interests geroscience, which explores the relationship between biological aging, disease and healthy years of life. Described as a "pacemaker of female aging," the ovaries are being considered as a possible regulator of female aging. Whether they actually set this pace or merely make aging processes visible particularly early remains unclear. A simple cause-and-effect relationship has not yet been established.

Image: Visualisation of the Ovarian Clock © Petra Orzech

This new perspective has also captured the attention of American biohacker and longevity entrepreneur Kayla Barnes-Lentz. She focuses closely on her reproductive and metabolic health and has had her biological ovarian age assessed. Her approach is to view fertility as a potential marker of women's health and longevity.

While heart age, vascular age, muscle health and brain aging have long been associated with healthy aging, the ovaries have traditionally received attention mainly in relation to the desire to have children or to medical symptoms. This also reflects the gender gap in medicine: we still know too little about the significance of female biology for health beyond fertility. What happens to the ovaries when reproduction is no longer the goal?

As the follicle supply becomes depleted, ovulation becomes irregular and eventually stops. The cyclical production of estrogens and progesterone changes fundamentally. Menopause marks the end of the reproductive cycle.

But not the biology of the ovaries.

Postmenopausal ovaries are not dormant organs. Certain cells continue to produce sex hormones from the androgen group, including testosterone. Blood vessels and immune cells remain active in the connective tissue framework, known as the stroma. The tissue and the extracellular matrix that supports the cells continue to change.

This stage of life is surprisingly under-researched. We now know a great deal about the effects of the hormonal transition on bones, muscles, metabolism, blood vessels, the brain and urogenital tissue. We know far less about how the ovaries themselves continue to age and what this means for the rest of the body.

What happens in the ovaries can have effects far beyond the organs themselves. Estrogens produced by the ovaries travel through the bloodstream to the bones, brain, blood vessels, muscles and adipose tissue, among other areas. There, they influence cell functions through receptors. As hormone production declines, the conditions in these tissues also change. But do aging ovaries affect the body through other signaling molecules as well?

A review published in 2026 describes a possible "ovarian-systemic axis," meaning a connection between the ovaries and the rest of the body. In addition to hormonal signals, could inflammatory messengers, signals from senescent cells and metabolic products from the ovaries contribute to systemic aging - aging processes that affect the entire body and the interaction between its organs? The review also considers changes in the tissue environment of the ovaries. This is not yet a proven model. However, it could help explain how ovarian aging and the health of other organs are connected.

Researchers are testing a range of approaches. One example is PRP - platelet-rich plasma. This involves preparing plasma from a person's own blood with an increased concentration of platelets and injecting it directly into the ovaries. The growth factors and signaling molecules it contains are intended to influence the local tissue environment. The basic principle is familiar from the beauty sector through the so-called vampire facial: there, too, processed autologous blood is used, although it is applied to treat the skin. Its use in the ovaries carries its own risks and must be evaluated separately through scientific research. It sounds spectacular. So far, the evidence is less so.

Other approaches range from senolytics - substances designed to selectively eliminate senescent cells - to regenerative procedures intended to preserve or renew tissue. Others target energy production in the mitochondria or metabolic signaling pathways, the cellular control processes that regulate metabolism, growth and energy consumption. Increasingly, the aim goes beyond preserving fertility: can the aging processes of the ovaries themselves be influenced?

And what about menopausal hormone therapy (MHT)? It can alleviate menopausal symptoms. Whether it is appropriate should be assessed by a physician based on the individual's potential benefits and risks. According to current knowledge, there is no evidence that it also slows ovarian aging or replenishes the follicle supply.

If aging ovaries may help shape the aging of other organs, could removing them be beneficial? Before natural menopause, research points more toward the opposite. When both ovaries are removed, their hormone production stops abruptly. In a long-term study, women whose ovaries had been removed before the age of 46 developed multiple chronic conditions more rapidly than women who had not undergone the procedure. These observational data suggest accelerated aging but do not prove a causal relationship.

The apparent paradox is that the ovaries age early while also performing important functions for the rest of the body. Removing them eliminates not only a potential source of aging signals, but also these functions. The findings support preserving healthy ovaries before natural menopause unless there is a medical reason to remove them. This finding cannot simply be applied to the period after menopause.

• The ovaries are more than reproductive organs. They contain egg cells, produce sex hormones and communicate with the entire body through hormonal and other molecular signals.

• Ovarian aging begins early. The number and quality of follicles decline long before menopause. At the same time, the mitochondria, cell communication, inflammatory processes, senescence and the tissue environment of the ovaries change.

• Menopause is not the beginning of ovarian aging. Rather, it is a visible turning point in a process that began decades earlier.

• After menopause, the ovaries are not biologically "switched off." Their reproductive cycle ends, but the organs and their tissues continue to change.

• The ovaries and the body are interconnected. The possible ovarian-systemic axis describes how hormones, inflammation, senescence and metabolism could link the ovaries to systemic aging. A causal relationship has not yet been conclusively established.

• The "pacemaker of female aging" is therefore an intriguing hypothesis - not a definitive finding. The ovaries may influence the aging of other organs, or they may simply make systemic aging processes visible particularly early.

• We cannot yet rejuvenate the ovaries. MHT (menopausal hormone therapy) does not replace the follicle supply or turn back the ovarian clock. Regenerative approaches such as PRP are experimental; controlled studies have so far shown no consistent benefit for clinically relevant reproductive outcomes.

• The new longevity question is therefore: What can our ovaries tell us about healthy aging in women - before and after menopause?

The ovaries begin to change early at the cellular, metabolic, structural and hormonal levels. Menopause ends their reproductive function, but not their biological story. It remains unclear whether they drive the aging of other organs or reveal it particularly early, and whether we may one day be able to intervene in these processes in a targeted way.

There is currently no specific "ovarian longevity diet," supplement or exercise program proven to slow the ovarian clock. Nevertheless, we do not have to wait for tomorrow's research to support healthy aging today. Many of the processes involved in ovarian aging - inflammation, metabolism, mitochondrial function and cellular stress - are part of our overall biology. A balanced diet geared toward reducing inflammation, regular physical activity, sufficient sleep, not smoking and effectively managing chronic stress therefore create favorable conditions for healthy aging overall. Whether and to what extent they also directly influence ovarian aging remains unknown.

Perhaps this is the most important insight at present: we do not need to "rejuvenate" the ovaries in isolation. We should begin to understand them as part of an interconnected female organism. This links women's health to a broader longevity question: what can the ovaries tell us about a long and healthy life for women, even when fertility is no longer an issue?