31/10/2025
A groundbreaking 2025 study published in Science Advances has revealed that while women experience a decline in the number of eggs as they age, the quality of those eggs at the DNA level remains surprisingly stable. In contrast, men’s s***m accumulates genetic mutations over time, making older fathers more likely to pass on DNA errors that can contribute to developmental and neurological conditions in their children.
Researchers found that these s***m mutations increase steadily with age, particularly after 40, while eggs showed minimal DNA damage accumulation. This challenges decades of assumptions about female fertility and aging — and flips the traditional “biological clock” narrative on its head.
The implications are significant: men’s age can influence conception success, pregnancy outcomes, and long-term child health just as much as women’s.
In essence, time affects both sexes — just in very different ways.
