Increasing maternal body mass index and characteristics of the second stage of labor.

Robinson BK, Mapp DC, Bloom SL, Rouse DJ, Spong CY, Varner MW, Ramin SM, Sorokin Y, Sciscione A, Mercer BM, Thorp JM, Malone FD, Harper M, Ehrenberg H. Increasing maternal body mass index and characteristics of the second stage of labor. Obstet Gynecol. 2011 Dec; 118(6):1309-1313.

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