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Creinin MD, Huang X, Westhoff C, Barnhart K, Gilles JM, Zhang J; National Institute of Child Health and Human Development Management of Early Pregnancy Failure Trial.Creinin MD, et al.Obstet Gynecol. 2006 Apr;107(4):901-7. doi: 10.1097/01.AOG.0000206737.68709.3e.Obstet Gynecol. 2006.PMID: 16582130Free PMC article.Clinical Trial.