title: Unconjugated estriol values between 14 and 22 weeks of gestation in relation to prenatal screening for Down syndrome.
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Bestwick
authors.forename: Wayne J
authors.initials: WJ
authors.lastname: Huttly
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Wald
mesh_terms: D015415:Biomarkers / Q000032:analysis / Q000097:blood / Q000737:chemistry; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis*; D004964:Estriol / Q000032:analysis / Q000097:blood* / Q000737:chemistry; D005260:Female; D005865:Gestational Age; D006801:Humans; D016014:Linear Models; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000097:blood*; D011262:Pregnancy Trimester, Second / Q000097:blood*; D011296:Prenatal Diagnosis / Q000379:methods*
chemical_list: D015415:Biomarkers; D004964:Estriol