全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:... Danielle Noell , Washington C. Hill , Isaac Delke
来源:[J].Seminars in Perinatology(IF 2.814), 2012, Vol.36 (1), pp.31-36Elsevier
摘要:At the beginning of the 20th century, maternal mortality was a leading cause of death for women of reproductive age in the United States. Obstetrical care was not standardized, and there was a lack of universal systems for monitoring maternal deaths. Public health efforts of surv...

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