title: Diagnostic thyroxine ratio--a screening test.
mesh_terms: D005260:Female; D006801:Humans; D008722:Methods; D011247:Pregnancy; D013959:Thyroid Diseases / Q000175:diagnosis*; D013960:Thyroid Function Tests; D013974:Thyroxine / Q000097:blood*
chemical_list: D013974:Thyroxine