In the clinic
Transverse and sagittal measurements of a woman’s pelvic inlet and outlet can help in predicting the likelihood of a successful vaginal delivery. These measurements include: the sagittal inlet (between the promontory and the top of the pubic symphysis), the maximum transverse diameter of the inlet, the bispinous outlet (the distance between ischial spines), and the sagittal outlet (the distance between the tip of the coccyx and the inferior margin of the pubic symphysis).