title: Follow-up of elevated maternal serum alpha-fetoprotein levels: ultrasonography only or amniocentesis?
authors.forename: N
authors.initials: N
authors.lastname: Whitehead
authors.forename: W
authors.initials: W
authors.lastname: MacMahon
authors.forename: P
authors.initials: P
authors.lastname: Fernhoff
authors.forename: J
authors.initials: J
authors.lastname: Priest
mesh_terms: D000649:Amniocentesis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins