title: [A two-site ELISA using monoclonal antibodies in the diagnosis of early pregnancy].
mesh_terms: D000911:Antibodies, Monoclonal; D006063:Chorionic Gonadotropin / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D011247:Pregnancy; D011259:Pregnancy Tests, Immunologic / Q000379:methods*; D011261:Pregnancy Trimester, First
chemical_list: D000911:Antibodies, Monoclonal; D006063:Chorionic Gonadotropin