title: Continuation rates of use with a closed, non-tailed intrauterine device: polygon (M) and Lippes' loop (B).
mesh_terms: D000328:Adult; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007194:India; D007434:Intrauterine Devices / Q000706:statistics & numerical data*; D011247:Pregnancy; D013223:Statistics as Topic; D013997:Time Factors