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Chen BA, Reeves MF, Creinin MD, Gilles JM, Barnhart K, Westhoff C, Zhang J; National Institute of Child Health and Human Development Management of Early Pregnancy Failure Trial.Chen BA, et al. Among authors: zhang j.Am J Obstet Gynecol. 2008 Jun;198(6):626.e1-5. doi: 10.1016/j.ajog.2007.11.045. Epub 2008 Feb 15.Am J Obstet Gynecol. 2008.PMID: 18279821Free PMC article.Clinical Trial.