7Gupta JK, Nikodem C. Maternal posture in labour. Eur J Obstet Gynecol Reprod Biol, 2000,92(2) :273-277.
8Carbonne B, Benachi A, L6vbque M, et al. Matemal position during labor:effects on fetal oxygen saturation measured by pulse oximetry. Obstet Gynecol, 1996,88 (4) : 797-800.
9Bodner-Adler B. Women' s position during labour: influence on maternal and neonatal outcome. Wien Klin Wochenschr, 2003, 115(19-20) : 720-723.
10Allahbadia GN, Vaidya PR. Squatting position for delivery. J Indian Med Assoc, 1993,91( 1 ) :13-16.
7Simkin P,Ancheta R. The labor progress handbook[M].陈改婷.张宏玉泽.西安:世界图书出版社.2011:224-225.
8Robertson SA, Christiaens J, Dorian CL, et al. Interleukin - 6 is an essential determinant of on - time parturition in the mouse [J ] . Endocrinology, 2010, 151 (8): 184-188.
9Lee DC, Romero R, Kim JS, et al. Evidence for a spatial and temporal regulation of prostaglandin - endoperoxide syn- thase 2 expression in human amnion in term and preterm partu- rition [ J ] . The Journal of clinical endocrinology and metabo- lism, 2010, 95 (9): 165-169.