Antenatal screening policies for Down's syndrome. Audit of Down's syndrome screening is not valid.
Wald
Nicholas J
NJ
Huttly
Wayne
W
Hackshaw
Allan K
AK
D000328:Adult; D015415:Biomarkers / Q000097:blood; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008423:Maternal Age; D008485:Medical Audit; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012680:Sensitivity and Specificity
D015415:Biomarkers