<prompt> False about female pelvis:Narrow pelvic plane lies at the level of ischial spinesPlane of greatest pelvis dimension corresponds to SI S2 vertebraeAngle of inclination is 55degPlane of least pelvic dimension form plane of obstetrical outlet  <response>: Ans: B Plane... FEMALE PELVISFor descriptive purpose, true pelvis is divided into inlet, cavity outlet It is shallow in front, formed by symphysis pubis measures 4 cm deep posteriorly, formed by sacrum coccyx measures 11.5 cm- Duttas Obstetrics 6th 88Pelvic cavity: The cavity is curved in such a way that it is first directed downwards backwards, then downwards the forwards J-shaped. It has unequal walls, measuring only about 5 cm anteriorly 15 cm posteriorly BDC4thVol. II-343In the erect posture, the pelvis is tilted forward. As such, the plane of the inlet makes an angle of about 550 with the horizontal is called angle of inclination- Duttas Obstetrics 6th88Plane of greatest pelvis dimension: The plane extends from the midpoint of posterior surface of symphysis pubis to the junction of the second third sacral vertebrae- Duttas Obstetrics 6th 90Obstetrical outlet: It is the segment of the pelvis bounded above by the plane of least pelvic dimensions below by the anatomical outlet- Duttas Obstetrics 6th 91Plane of least pelvis dimension or narrow pelvic plane: The plane extend from the lower border of the symphysis pubis to the tip of ischial spines posteriorly to meet the tip of fifth sacral vertebrae. It is irregularly oval notched on each side by the ischial spine Duttas Obstetrics 6th 91 