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Ultrasonography, Prenatal
Karyotyping
Amniocentesis
Pregnancy
Second Pregnancy Trimester
Maternal Age
First Pregnancy Trimester
Likelihood Functions
Risk Factors
Biological Markers
Risk Assessment
Sensitivity and Specificity
Down's Syndrome
Fetal Diseases
Cystic Lymphangioma
Ovotesticular Disorders of Sex Development
Neck
Aneuploidy
Estriol
alpha-Fetoproteins
Co-Publications
11
4
3
2
1
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