title: Letter: Thyroxine and triiodothyronine in cord serum.
mesh_terms: D000328:Adult; D001769:Blood; D005260:Female; D006801:Humans; D011247:Pregnancy; D011863:Radioimmunoassay; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*; D014470:Umbilical Cord
chemical_list: D014284:Triiodothyronine; D013974:Thyroxine