Fig. 3From: Predictive factors for the success of McRoberts’ manoeuvre and suprapubic pressure in relieving shoulder dystocia: a cross-sectional studyDifference in pelvic incidence angles between Asian and Caucasian pelvises and direction of force (as indicated by black arrows) needed to achieve pelvic rotation. - Based on data from Zárate-Kalfópulos B, Romero-Vargas S, Otero-Cámara E, Correa VC, Reyes-Sánchez A. Differences in pelvic parameters among Mexican, Caucasian, and Asian populations. J Neurosurg Spine. 2012;16:516–519 [23]Back to article page