Should sonographic screening for fetal Down syndrome be applied to low risk women?
Benacerraf
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BR
D004314:Down Syndrome / Q000000981:diagnostic imaging* / Q000235:genetics; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D012307:Risk Factors; D016216:Ultrasonography, Prenatal