Preterm birth rates are down for the sixth year in a row, but they remain high in these 10 states.
Preterm birth rates have dropped for the sixth year in a row nationwide, but they remain high in these 10 states with the worst premature birth rates, according to this year's March of Dimes Premature Birth Report Card.
iStock / WinterStorm
Courtesy Dan Shakal
U.S. Post Office
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