Diagnostic accuracy of first-trimester free beta-HCG and pregnancy-associated plasma protein-A assays.
Feddema
Peter
P
Vankrieken
Leo
L
de Pillecijn
Filip
F
Durham
A Paul
AP
D006063:Chorionic Gonadotropin / Q000097:blood*; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism*; D012680:Sensitivity and Specificity
D006063:Chorionic Gonadotropin; D011266:Pregnancy-Associated Plasma Protein-A