title: Adjusting the risk for trisomy 21 using multiple sonographic markers.
authors: A
authors: A
authors: Ghidini
mesh_terms: D000328:Adult; D004314:Down Syndrome / Q000209:etiology*; D005260:Female; D005544:Forecasting; D006801:Humans; D016013:Likelihood Functions; D016015:Logistic Models; D008423:Maternal Age; D015999:Multivariate Analysis; D016017:Odds Ratio; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D012307:Risk Factors; D016216:Ultrasonography, Prenatal