title: Maternal serum alpha-fetoprotein and premature delivery.
authors.forename: A M
authors.initials: AM
authors.lastname: Johnson
mesh_terms: D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature; D011247:Pregnancy / Q000097:blood*; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins