Second trimester triple maternal screen:Imp:Pt:Ser/Plas:Nar
second trimester triple maternal screen:imp:pt:ser/plas:nar
Second trimester triple maternal screen:Impression/interpretation of study:To identify measures at a point in time:Serum/Plasma:Narrative
second trimester triple maternal screen:impression/interpretation of study:to identify measures at a point in time:serum/plasma:narrative