Trisomy 21 risk based on maternal age + Pregnancy associated plasma protein A + Choriogonadotropin + Nuchal translucency:Likelihood:Pt:^Fetus:Qn
trisomy 21 risk based on maternal age + pregnancy associated plasma protein a + choriogonadotropin + nuchal translucency:likelihood:pt:^fetus:qn
Trisomy 21 risk based on maternal age + Pregnancy associated plasma protein A + Choriogonadotropin + Nuchal translucency:Likelihood:To identify measures at a point in time:^Fetus:Quantitative
trisomy 21 risk based on maternal age + pregnancy associated plasma protein a + choriogonadotropin + nuchal translucency:likelihood:to identify measures at a point in time:^fetus:quantitative