Midpelvis is the segment of the pelvis

• A. bounded above by the plane of greatest pelvic dimensions and below by a plane known as midpelvic plane.
• B. bounded by he brim of the pelvis, the circumference of the inlet
• C. forms the canal through which the fetus has to pass
• D. formed by the iliac portions of the innominate bones and is limited above by the iliac crests