Screening for fetal trisomy 21: voluntary registration of pregnancy outcome is invalid.
Gyselaers
W J A
WJ
Stoop
D P M
DP
Van Holsbeke
C D Y J
CD
Van Herck
E J H
EJ
Straetmans
D P L
DP
Vereecken
A J
AJ
Ombelet
W U A M
WU
Nijhuis
J G
JG
D000328:Adult; D001530:Belgium / Q000453:epidemiology; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D012042:Registries; D035141:Voluntary Programs