07/22/2014 01:55 pm ET

Why Are Poor Women Having Healthier Babies?

RuslanDashinsky via Getty Images

A new study shows that the birth weight of infants -- an indicator of baby health -- born to poor women in the United States has improved since the late ‘80s. As the Washington Post reports, in 1989 one-in-six babies born to poor women were considered underweight (under 5 ½ pounds at birth), compared to one-in-32 babies born to wealthier women. In 2011, that gap had shrunk to one-in-eight underweight babies born to poor women, while the rates for wealthier women had remained unchanged.

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