A new study suggests that the length of a woman’s reproductive lifespan may influence her risk of cognitive decline later in life. The research was published in the journal Menopause.
Studying the Link
Researchers analyzed over 30 years of existing research, including data from more than 14,000 women. They focused on the connection between reproductive lifespan—the time from a woman’s first period to menopause—and cognitive health.
During this reproductive period, women are exposed to endogenous estrogen. Levels of this hormone drop after menopause. The study authors note that women tend to experience cognitive decline at a faster rate than men, suggesting estrogen may play a role.
The review found that longer reproductive lifespans were associated with better maintenance of cognitive abilities. In contrast, the use of hormone therapy did not show the same cognitive benefits.
Why It Matters
Cognitive decline is an early sign of dementia, which impacts women more than men. These findings highlight the importance of understanding hormones in overall health.
The results also point researchers toward finding new ways to help women preserve cognitive abilities, given that hormone therapy did not replicate the benefit of a longer natural reproductive span.
Stephanie Faubion M.D., medical director for The Menopause Society, commented on the findings. “This large observational study showed an association of longer reproductive span with better cognitive trajectories,” she said. “However, longer duration of hormone therapy use was not associated with better global cognitive performance.”
While genetics heavily influence reproductive lifespan, lifestyle factors can also play a part. These can include maintaining adequate vitamin D levels, eating a healthy diet, and working to balance hormones.
The study is part of a growing body of research focused on women’s health, which has historically received less scientific attention than men’s health. Understanding the role of reproductive hormones is seen as key to addressing women’s specific health needs as they age.
