Study observation.general:Imp:Pt:^Fetuses:Nar:US
study observation.general:imp:pt:^fetuses:nar:us
Study observation.general:Impression/interpretation of study:To identify measures at a point in time:^Fetuses:Narrative:Ultrasound
study observation.general:impression/interpretation of study:to identify measures at a point in time:^fetuses:narrative:ultrasound