title: Unusually rapid incarceration of a polyvinyl ring pessary.
mesh_terms: D005260:Female; D005549:Foreign-Body Reaction / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D010570:Pessaries / Q000009:adverse effects*; D011145:Polyvinyls; D014596:Uterine Prolapse / Q000601:surgery*; D014627:Vaginitis / Q000209:etiology*
chemical_list: D011145:Polyvinyls