Answer
Two pelvic axes have been defined; the anatomical pelvic axis and the obstetrical pelvic axis
The significance of the obstetrical pelvic axis is that it is the path by which a baby's head travels in a normal birth.
Work Step by Step
The pelvic axis (obstetrical ) is a hypothetical line along which a baby's head passes in a normal birth. It passes down and back from the central point of the plane of the pelvic inlet, then downward and forward ( like a modified hook) along the axis to the center of the pelvic outlet.
