Study observation:Find:Pt:Head.intracranial anatomy^Fetus:Nom:US
study observation:find:pt:head.intracranial anatomy^fetus:nom:us
Study observation:Finding:To identify measures at a point in time:Head.intracranial anatomy^Fetus:Nominal:Ultrasound
study observation:finding:to identify measures at a point in time:head.intracranial anatomy^fetus:nominal:ultrasound