Around the same time that women began living longer than men, the number of children they had also began to fall. The researchers found that women who had at least 15 children lived on average six years less than men.
Study leader Elisabeth Bolund explained that the research highlights, “the importance of considering biological factors when elucidating the causes of shifting mortality [death] patterns in human populations. Our results have implications for demographic forecasts, because fertility patterns and expected life spans are continuously changing throughout the world.”
“For example, the results suggest that as more and more countries throughout the world go through the demographic transition, the overall sex differences in life span may increase,” Bolund concluded.
Also, read Bel Marra Health’s article on Metabolism affects aging rate, longevity and mortality.
Sources:
http://www.uu.se/en/media/press-releases/press-release/?id=3196&area=3,8&typ=pm&lang=en