title: Early prenatal screening matures.
authors: B
authors: B
authors: Chapman
mesh_terms: D015415:Biomarkers; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism; D011296:Prenatal Diagnosis / Q000639:trends*; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal
chemical_list: D015415:Biomarkers; D011266:Pregnancy-Associated Plasma Protein-A