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contentuptodate· Content· item f2_20_2382

©2013 UpToDate ® Print Email Average labor curve by parity Average labor curves by parity in singleton term pregnancies with spontaneous onset of labor, vaginal delivery, and normal neonatal outcomes. P0: nulliparous women; P1: women of parity 1; P2+: women of parity 2 or higher. Reproduced with permission from: Zhang J, Landy H, Ware Branch D, et al. Contemporary patterns of spontaneous labor with normal neonatal outcomes. Obstet Gynecol 2010; 116:1281. Copyright © 2010 Lippincott Williams & Wilkins.