Trisomy 21 risk based on maternal age + Alpha-1-Fetoprotein + Choriogonadotropin + Estriol.unconjugated:Likelihood:Pt:^Fetus:Qn
trisomy 21 risk based on maternal age + alpha-1-fetoprotein + choriogonadotropin + estriol.unconjugated:likelihood:pt:^fetus:qn
Trisomy 21 risk based on maternal age + Alpha-1-Fetoprotein + Choriogonadotropin + Estriol.unconjugated:Likelihood:To identify measures at a point in time:^Fetus:Quantitative
trisomy 21 risk based on maternal age + alpha-1-fetoprotein + choriogonadotropin + estriol.unconjugated:likelihood:to identify measures at a point in time:^fetus:quantitative