Several studies have provided a reassuring observation about the lifespan of mothers who give birth later in life. The NIH published findings from one particular study titled, "The Long Life Family Study" which found "a positive association between older maternal age and greater odds for surviving to an unusually old age."

Additionally, the NIH includes that an "analysis of New England Centenarian Study cohort data revealed that women who gave birth to a child after the age of 40 had four times greater odds of being a centenarian compared to women from the same birth cohort who had their last child at younger ages."

Read more here from the NIH.

Source: Extended Maternal Age at Birth of Last Child and Women’s Longevity in the Long Life Family Study (NIHMS608549), National Institutes of Health.