Current Down syndrome risk estimates are reliable.
Palomaki
G E
GE
Neveux
L M
LM
Haddow
J E
JE
D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood; D004314:Down Syndrome / Q000175:diagnosis*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D011247:Pregnancy; D012307:Risk Factors; D000509:alpha-Fetoproteins / Q000032:analysis
D018997:Chorionic Gonadotropin, beta Subunit, Human; D000509:alpha-Fetoproteins