The authors focus on a reduction in infant mortality rates in the U.S. from 2006-2011. They state that the largest decline in infant mortality was seen among non-Hispanic Black women while the preterm birth rate declined by 10 percent from 2006-2012. They mention the U.S. is still ranked near the bottom in infant mortality and other birth outcomes among developed nations and has significant ethnic and socioeconomic disparities. They comment on a national strategy to reduce infant mortality.
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Lu et al. (2014) studied this question.
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