Estimation of risk in second trimester serum screening for Down syndrome among women who have already had first trimester screening.
Hackshaw
Allan
A
Wald
Nicholas
N
D000328:Adult; D015415:Biomarkers / Q000097:blood; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis*; D015987:Effect Modifier, Epidemiologic; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods; D008423:Maternal Age; D009333:Neck / Q000000981:diagnostic imaging / Q000196:embryology; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D018566:Pregnancy, High-Risk; D018570:Risk Assessment; D012307:Risk Factors; D016216:Ultrasonography, Prenatal
D015415:Biomarkers