Media type: E-Article Title: Changes in Pregnancy Mortality Ascertainment : United States, 1999–2005 : United States, 1999–2005 Contributor: MacKay, Andrea P.; Berg, Cynthia J.; Liu, Xiang; Duran, Catherine; Hoyert, Donna L. imprint: Ovid Technologies (Wolters Kluwer Health), 2011 Published in: Obstetrics & Gynecology Language: English DOI: 10.1097/aog.0b013e31821fd49d ISSN: 0029-7844 Keywords: Obstetrics and Gynecology Origination: Footnote: