| In 2010, there were 339,189 late preterm births in the United States, representing 8.5% of live births. | | Between 2000 and 2010, the rate of infants born late preterm in the United States increased nearly 4%. |
Source
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National Center for Health Statistics, final natality data.
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Retrieved June 19, 2013, from www.marchofdimes.com/peristats.
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