title: A comparative study of loop smears and copper device smears.
mesh_terms: D004717:Endometrium / Q000473:pathology; D005260:Female; D005549:Foreign-Body Reaction / Q000473:pathology; D006801:Humans; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D014626:Vaginal Smears