title: Calculating amniotic fluid alpha-fetoprotein median values in the first trimester.
authors.forename: G E
authors.initials: GE
authors.lastname: Palomaki
authors.forename: G J
authors.initials: GJ
authors.lastname: Knight
authors.forename: J E
authors.initials: JE
authors.lastname: Haddow
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000737:chemistry*; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012016:Reference Values; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins