The accuracy of assigned risks in maternal serum screening.
Canick
J A
JA
Rish
S
S
D004314:Down Syndrome / Q000097:blood* / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012307:Risk Factors; D012680:Sensitivity and Specificity