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Reassessing the labor curve in nulliparous women.
Zhang J, Troendle JF, Yancey MK. Zhang J, et al. Am J Obstet Gynecol. 2002 Oct;187(4):824-8. doi: 10.1067/mob.2002.127142. Am J Obstet Gynecol. 2002. PMID: 12388957
Risk factors for birth canal lacerations in primiparous women.
Mikolajczyk RT, Zhang J, Troendle J, Chan L. Mikolajczyk RT, et al. Among authors: zhang j. Am J Perinatol. 2008 May;25(5):259-64. doi: 10.1055/s-2008-1075040. Am J Perinatol. 2008. PMID: 18509884 Free PMC article.
The natural history of the normal first stage of labor.
Zhang J, Troendle J, Mikolajczyk R, Sundaram R, Beaver J, Fraser W. Zhang J, et al. Obstet Gynecol. 2010 Apr;115(4):705-710. doi: 10.1097/AOG.0b013e3181d55925. Obstet Gynecol. 2010. PMID: 20308828
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