title: [Observations on the duration of continual intrauterine insertion of stainless steel ring (author's transl)].
mesh_terms: D000328:Adult; D004717:Endometrium / Q000473:pathology; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008875:Middle Aged; D013193:Stainless Steel; D013997:Time Factors
chemical_list: D013193:Stainless Steel