title: Letter: Intrauterine contraceptive devices.
mesh_terms: D000293:Adolescent; D000328:Adult; D001419:Bacteria / Q000302:isolation & purification; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects; D008875:Middle Aged; D011247:Pregnancy; D014621:Vagina / Q000382:microbiology