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 Reproductive Lifespan and Cognition
Researchers analyzed over 30 years of existing research, including data from more than 14,000 women. They focused on the connection between reproductive lifespan, which is the time from a woman’s first period to menopause, and cognitive health.
During the reproductive years, women are exposed to the hormone 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, leading to theories that estrogen may play a protective role.
The analysis found that a longer reproductive lifespan was associated with better maintenance of cognitive function. However, the use of hormone therapy did not show the same cognitive benefits.
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 in a news release. “However, longer duration of hormone therapy use, either within or outside 10 years of menopause, was not associated with better global cognitive performance.”
The findings are considered important because cognitive decline is an early sign of dementia, and women are disproportionately affected by dementia compared to men. The results indicate a need to better understand the role of hormones in long-term health.
Since hormone therapy did not replicate the benefit of a natural, longer reproductive span, the study suggests researchers should look for new approaches to help women preserve cognitive abilities as they age.
While genetics heavily influence reproductive lifespan, lifestyle can also be a factor. Maintaining adequate vitamin D levels, balancing hormones, and eating a healthy diet can support fertility and reproductive health.
The research is part of a growing body of work focused on women’s health, which has historically received less scientific attention than men’s health. Understanding the specific role of reproductive hormones is seen as key to addressing women’s health needs throughout life.
