Impoance of the plane of midpelvis is: (A) Superior strait, (B) Inferior strait, (C) Plane of least pelvic dimensions, (D) Plane of greatest pelvic dimensions
Answer is C. The pelvis is described as having four imaginary planes:The plane of the pelvic inlet--the superior strait. 2. The plane of the pelvic outlet--the inferior strait. 3. The plane of the midpelvis--the least pelvic dimensions. 4. The plane of greatest pelvic dimension--of no obstetrical significance.(Ref: William's Obstetrics; 25th edition)