Women Who Give Birth For First Time At 25 More Likely To Live Longer, Study Finds

PHILADEPLHIA (CBS) -- A new study finds that women who give birth for the first time at the age of 25 or older are more likely to live to 90.

HealthDay News reports that researchers found that these women were 21 percent more likely to live to 90 than those giving birth before the age of 25.

The study also indicates that women who lived to the age of 90 were more likely to be college graduates, married and earned more.

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"Our study results don't suggest women should delay childbearing, because it's not clearly known why the results suggest longevity," study author Aladdin Shadyab, a postdoctoral fellow at the University of California, San Diego School of Medicine, told HealthDay News. "Also, a likely explanation is that women who have a child at an older age are usually of higher social and economic statue. We know from research that these people are also likely to live longer."

According to research published in 2015, women who gave birth to their last child after the age of 33 were twice as likely to live to at least 95 as women doing so by age 29.

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HealthDay News reports that researchers examined data for nearly 20,000 women as part of a study that began in 1993. Those women were tracked for up to 21 years, and the study revealed that 54 percent of them lived to 90.

"Reproductive factors rarely receive attention in relation to longevity," Shadyab told HealthDay News. "Usually research is focused on physical activity, diet and [other factors] related to longevity, but [not] reproductive factors.

The study was published in the American Journal of Public Health.