title: A simplified isometric method of cephalopelvimetry with the use of a three-directional x-ray pelvimetry chair.
mesh_terms: D002508:Cephalometry; D005260:Female; D006801:Humans; D008722:Methods; D010387:Pelvimetry; D011247:Pregnancy; D013679:Technology, Radiologic / Q000295:instrumentation*