title: Sequential first and second trimester screening tests: correlation of the markers' levels in normal versus Down syndrome affected pregnancies.
authors.forename: R
authors.initials: R
authors.lastname: Maymon
authors.forename: M
authors.initials: M
authors.lastname: Bergman
authors.forename: S
authors.initials: S
authors.lastname: Segal
authors.forename: E
authors.initials: E
authors.lastname: Dreazen
authors.forename: Z
authors.initials: Z
authors.lastname: Weinraub
authors.forename: A
authors.initials: A
authors.lastname: Herman
mesh_terms: D015415:Biomarkers / Q000032:analysis*; D006063:Chorionic Gonadotropin / Q000097:blood; D004314:Down Syndrome / Q000175:diagnosis*; D004964:Estriol / Q000097:blood; D005260:Female; D005865:Gestational Age; D006801:Humans; D009333:Neck / Q000000981:diagnostic imaging; D011247:Pregnancy; D011266:Pregnancy-Associated Plasma Protein-A / Q000032:analysis; D011296:Prenatal Diagnosis; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D015415:Biomarkers; D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins; D011266:Pregnancy-Associated Plasma Protein-A; D004964:Estriol