Study observation.general:Imp:Pt:^Fetus:Nom:US
study observation.general:imp:pt:^fetus:nom:us
Study observation.general:Impression/interpretation of study:To identify measures at a point in time:^Fetus:Nominal:Ultrasound
study observation.general:impression/interpretation of study:to identify measures at a point in time:^fetus:nominal:ultrasound