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Are preterm births on the decline in the United States
Espandi opera
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Births in the United States, 2019
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Declines in triplet and higher-order multiple births in the United States, 1998-2014
Espandi opera
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Describing the increase in preterm births in the United States, 2014-2016
Espandi opera
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Exploring the decline in the Singleton preterm birth rate in the United States, 2019-2020
Espandi opera
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Is twin childbearing on the decline
Espandi opera
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Three decades of twin births in the United States, 1980-2009
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Triplet births
Espandi opera
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