Association of Cervical Effacement with the Rate of Cervical Change in Labor among Nulliparous Women

Elizabeth S. Langen, Steven J. Weiner, Steven L. Bloom, Dwight J. Rouse, Michael W. Varner, Uma M. Reddy, Susan M. Ramin, Steve N. Caritis, Alan M. Peaceman, Yoram Sorokin, Anthony Sciscione, Marshall W. Carpenter, Brian M. Mercer, John M. Thorp, Fergal D. Malone, Jay D. Iams