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How do health care providers diagnose Down syndrome?
Making Informed Decisions: Down Syndrome Screening Explained
Down syndrome - Diagnosis and treatment - Mayo Clinic
Down's Syndrome Screening: What to Expect - Patient
What Tests Check for Down Syndrome During Pregnancy? - WebMD
Down Syndrome Tests: MedlinePlus Medical Test
Prenatal Testing for Down Syndrome | Patient Education - UCSF Health
National Association for Down Syndrome | Prenatal Testing and Diagnosis
Screening for Down's syndrome, Edwards' syndrome and Patau's syndrome
Down syndrome screening - BabyCenter