title: Trisomy 21 DNA test (MaterniT21) for detecting Down syndrome in the first trimester.
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D005820:Genetic Testing / Q000379:methods*; D006801:Humans; D007348:Insurance, Health; D011247:Pregnancy; D011248:Pregnancy Complications; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis / Q000379:methods; D014481:United States