| ［1］ Dupuis O, Silveira R, Zentner A,et al. Birth simulator: reliability of transvaginal assessment of fetal head station as defined by the American College of Obstetricians and Gynecologists classification［J］. Am J Obstet Gynecol, 2005，192(3):868-874.［2］ Lumbiganon P, Laopaiboon M, Gülmezoglu AM, et al.Method of delivery and pregnancy outcomes in Asia: the WHO global survey on maternal and perinatal health 2007-2008［J］.Lancet, 2010, 375(9713):490-499.［3］ Macdorman MF,Delercq E,Menaeker F,et al.Infant and neonatal mortality for primary cesarean and vaginal births to women with "no indicated risk" United States,1998～2001 birth cohorts［J］. Birth, 2006, 33(3):175-182.［4］ Spong CY, Berghella V, Wenstrom KD,et al. preventing the first cesarean delivery: summary of a joint Eunice Kennedy Shriver National Institute of Child Health and Human Development, Society for Maternal-Fetal Medicine, and American College of Obstetricians and Gynecologists Workshop［J］. Obstet Gynecol, 2012，120(5): 1181-1193.［5］ Barnea O, Luria O, Jaffa A,et al. Relations between fetal head descent and cervical dilatation during individual uterine contractions in the active stage of labor［J］. J Obstet Gynaecol Res, 2009，35(4):654-659.［6］ Ghi T, Youssef A, Maroni E, et al. Intrapartum transperineal ultrasound assessment of fetal head progression in active second stage of labor and mode of delivery［J］. Ultrasound Obstet Gynecol, 2013, 41(4): 430-435.［7］ Frideman EA. Primigravia labor agraphicostatistical analysis［J］. Am J Obstet Gynecol, 1955, 6: 567-589.［8］ Cunningham F. Williams Obstetrics［M］.23rd ed. New York : The McGraw- Hill Companies, 2010: 544-564.［9］ Zhang J, Troendle J, Mikolajczyk R, et al. The natural history of the normal first stage of labor［J］. OG, 2010, 115: 705-710.［10］ Zhang J, Landy HJ, Branch DW, et al. Contemporary patterns of spontaneous labor with normal neonatal outcomes［J］. OG, 2010, 116（6）:1281-1287.［11］ Nizard J, Haberman S, Paltieli Y, et al. How reliable is the determination of cervical dilation? Comparison of vaginal examination with spatial position-tracking ruler［J］. Am J Obstet Gynecol, 2009, 200(4): 402. e1-402. e4. ［12］ Haberman S, Paltieli Y, Gonen R,et al. Association between ultrasound-based assessment of fetal head station and clinically assessed cervical dilatation［J］. Ultrasound Obstet Gynecol, 2011,37(6):709-711.［13］ Burwick RM, Lee GT, Benedict JL, et al. Blinded comparison of cervical portio length measurements by digital examination vs Cervilenz［J］. Am J Obstet Gynecol, 2009,200(5):e37-39.（2014-10-01收稿 2014-11-15修回） |
