Ang fri hcg betakjedja och papp-a
Screening for trisomies 21, 18 and 13 by maternal age, fetal nuchal translucency, fetal heart rate, free beta-hCG and pregnancy-associated plasma protein-A - Scientific Figure on ResearchGate. Available from: www.researchgate.net/figure/Figure2-Distribution-of-MoM-values-of-free-b-hCG-and-of-PAPP-A-in-normal-fetuses-dark_fig2_5311861 [accessed 4 Apr, 2022]