7Vallejo M C, Firextone L L, Mandell G L, et al. Mffect of epidural analgesia with ambulation on labor duration [ J ]. Anesthesioiogy, 2001,95 (4) :875-861. 被引量：1
8Karraz M A. Ambulatory epidural anesthesia and the duration of labor [J]. Int J Gynaeco Obstet,2003,80(2) :117-122. 被引量：1
9Martion V, Iliceyo N, Simeoni U. Occipitoposterior fetal head position, matral and neonatal outcome [ J ]. Minerva Ginecol, 2007, 59(4) :459-464. 被引量：1
