Fig. 1

Pelvimetry measured by computed tomography. a: Midsagittal position, anteroposterior diameter of the pelvic inlet; b: anteroposterior diameter of the pelvic outlet; c: sacrococcygeal distance; d: pubic symphysis height; e: distance between the superior margin of the pubic symphysis and the coccyx; f: midpelvic anteroposterior diameter; α angle between the pelvic inlet and extension of the anteroposterior diameter of the pelvic outlet B, C transverse position, g: intertuberous distance; h: interspinous distance