title: Responsibilities associated with obstetric sonography.
authors.affiliation: Department of Radiology, UCSD Medical Center 92103.
authors.forename: G R
authors.initials: GR
authors.lastname: Leopold
mesh_terms: D005260:Female; D005333:Fetus; D006801:Humans; D009774:Obstetrics / Q000592:standards; D011247:Pregnancy; D014463:Ultrasonography / Q000592:standards