Advancing further the sonographic estimation of Down syndrome risk--how early can we go?
Benacerraf
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Diagnostic Ultrasound Associates, 333 Longwood Avenue, Boston MA 02115, USA. bbsono@aol.com
D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D018570:Risk Assessment; D016216:Ultrasonography, Prenatal