[Gen/Prenatal/Quad]
Down vs Turner vs Edwards vs Patau
Low AFP
Low b-HCG
High Estradiol
High inhibin
Down syndrome or Turner
(Down/Turner = high EI)
[Gen/Prenatal/Quad]
Down vs Turner vs Edwards vs Patau
High AFP
Normal b-HCG
Normal Estradiol
Normal inhibin
Patau T13
(Midline defect, +/- high AFP)
[Gen/Prenatal/Quad]
Down vs Turner vs Edwards vs Patau
Low b-HCG
Low Estradiol
Edwards T18
(HE is Low)