主题：【原创】送给孝子：骨质疏松 -- 虽远必诛

In their studies of centenarians, Perls and Fretts found that a surprising number of women who lived to be 100 or more gave birth in their forties. These 100-year-old women were four times as likely to have given birth in their forties as women born in the same year who died at age 73. A study of centenarians in Europe by the Max Planck Institute of Demography in Germany found the same relationship between longevity and fecundity.