Ovaries go through major changes after menopause, and scientists have discovered what happens during aging

Human ovaries continue to undergo active biological changes long after menopause ends, according to a new study published in the journal Aging Cell. Researchers found that these organs are not biologically inactive during this period but instead experience significant protein shifts linked to inflammation. These findings suggest that ovarian aging could serve as a third trigger for cancer development, alongside genetic factors and environmental influences. Although further research is required to determine if there is a specific point at which the organ becomes harmful, experts believe the data challenges the long-held assumption that postmenopausal ovaries remain dormant. The study examined tissue samples from 28 women aged 50 to 75. Scientists utilized technology capable of identifying and measuring thousands of proteins simultaneously. The analysis covered more than 5,800 groups of proteins within healthy ovarian tissue. Results indicated that ovaries keep changing even after they cease releasing egg cells. Samples taken from younger postmenopausal women contained higher levels of proteins associated with protecting cells and tissue. In contrast, older women exhibited higher levels of proteins connected to inflammatory processes. Researchers stated that these results challenge the paradigm that postmenopausal ovaries are biologically inert. Instead, the evidence points to tissue undergoing active remodeling. Birgit Schilling, a professor and head of the mass spectrometry center at the Buck Institute in California, noted that applying various statistical methods made it clear that the ovaries were not in a resting state. She explained that over decades, drastic differences emerged. Levels of certain proteins increased with age while others decreased, indicating that the organ is highly dynamic. Francesca Duncan, an associate professor of reproductive science in medicine at the Feinberg School of Medicine at Northwestern University, addressed common misconceptions regarding fertility. She observed that the ovary reaches a point of no return concerning reproduction because it no longer produces eggs. Duncan suggested that many people assume these organs simply sit idle, similar to an appendix. However, she emphasized that this investigation reveals a different reality. Her team had previously discovered similar evidence in mouse ovaries. Duncan argued that observing these patterns across different species provides confidence that the phenomenon is not random but represents a significant biological process. Duncan described the data as showing features of progressive aging. It appears that the ovary loses its original identity and begins performing a different function. She highlighted that scientists do not yet know if there is a moment in a woman’s life when the organ ceases to be useful and actually becomes detrimental. While the tissue included in the study did not contain cancer cells, some proteins associated with ovarian cancer were more frequent in aging ovaries. This trend was particularly noticeable among women in their sixties. Duncan clarified that this does not mean all postmenopausal women will develop ovarian cancer. Nevertheless, she noted that this fibrous inflammatory environment is precisely where cancer cells tend to settle most readily. Menopause is defined as the period when menstruation stops, typically occurring between ages 45 and 55. American researchers highlight that human ovaries are among the first organs to show functional decline related to aging, leading directly to this stage. The current findings underscore the complexity of post-reproductive biology. Future studies aim to pinpoint whether a specific threshold exists where the organ transitions from neutral to potentially harmful. Until then, the scientific community continues to monitor how protein levels shift in relation to age and health outcomes. The discovery adds a new layer to understanding how internal environments change over time. It prompts questions about preventive strategies for conditions linked to chronic inflammation. As medical science advances, the focus on non-reproductive functions of female organs grows stronger. This shift in perspective may influence future clinical guidelines and patient care discussions. The interplay between aging tissues and disease risk remains a critical area for ongoing inquiry.