title: The relation of the size and position of the uterus to the rate of expulsion of the Lippes loop.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D011247:Pregnancy; D013997:Time Factors; D014599:Uterus / Q000033:anatomy & histology*