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The Natural History of the Normal First Stage of Labor

Zhang, Jun PhD, MD; Sundaram, Rajeshwari PhD; Troendle, James PhD

doi: 10.1097/AOG.0b013e3181e5b09a
Departments: Letters to the Editor

Division of Epidemiology, Statistics and Prevention Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Besthesda, Maryland

Financial Disclosure: The authors did not report any potential conflicts of interest.

© 2010 by The American College of Obstetricians and Gynecologists. Published by Wolters Kluwer Health, Inc. All rights reserved.