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ALT 🧬 New research turns an old belief upside down! For years, we’ve heard that women’s egg quality drops sharply with age. But a new study from Penn State University, published in Science Advances, shows something surprising — women’s eggs actually stay much more stable than we thought, while it’s men’s sperm that seems to have a real biological clock. Researchers compared egg cells, blood, and saliva from women aged 20 to 42. They found that the eggs had far fewer DNA mutations than other body cells, and these mutations did not increase much with age. In other words, women’s eggs have built-in protection that helps them resist some effects of aging. On the other hand, studies show that as men get older, their sperm quality and DNA health decline, leading to lower fertility and a higher risk of genetic problems in children. This new discovery reminds us that fertility isn’t just about women getting older — men also have a biological clock ticking quietly in the background.