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
Ts 21risk-age+AFP+HCG+uE3 Fetus
ts 21risk-age+afp+hcg+ue3 fetus