title: Factors that affect IUD performance: a review and recommendations.
abstract: IUD design features that affect performance are reviewed and discussed. The use of a medicated device designed to be placed, retained and stabilized exclusively in the frontal plane of the upper uterine segment fulfills theoretical conditions of optimum performance.
mesh_terms: D004717:Endometrium / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects; D007436:Intrauterine Devices, Medicated; D008598:Menstruation; D011247:Pregnancy; D014599:Uterus / Q000033:anatomy & histology