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The Natural History of the Normal First Stage of Labor

Zhang, Jun PhD, MD; Fraser, William MD, MS; Troendle, James PhD; Sundaram, Rajeshwari PhD

doi: 10.1097/AOG.0b013e3181ee9ff3
Departments: Letters to the Editor

Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland; University of Montreal, Montreal, Quebec, Canada

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

© 2010 by The American College of Obstetricians and Gynecologists.