title: Letter: Abnormal factor-viii-related antigen, von Willebrand disease, and pregnancy.
mesh_terms: D000941:Antigens; D002648:Child; D005169:Factor VIII / Q000276:immunology*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000276:immunology*; D014842:von Willebrand Diseases / Q000235:genetics / Q000276:immunology*
chemical_list: D000941:Antigens; D005169:Factor VIII