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- :Callaghan, William M. ;Macdorman, Marian F.1 2017 | Am J Obstet Gynecol. 216(1):73.e1-73.e8:BackgroundThe U.S. infant mortality rate has been steadily decreasing in recent years as has the preterm birth rate; preterm birth is a major factor a...
- :Macdorman, Marian F. ;Mathews, T. J.March 2014 | NCHS Data Briefs:In 1900, almost all U.S. births occurred outside a hospital; however the proportion of out-of-hospital births fell to 44% by 1940 and to 1% by 1969, w...
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