Continuation rates of two different-sized copper intrauterine devices among nulliparous women: Interim 12-month results of a single-blind, randomised, multicentre trial.

Hubacher D, Schreiber CA, Turok DK, Jensen JT, Creinin MD, Nanda K, White KO, Dayananda I, Teal SB, Chen PL, Chen BA, Goldberg AB, Kerns JL, Dart C, Nelson AL, Thomas MA, Archer DF, Brown JE, Casta?o PM, Burke AE, Kaneshiro B, Blithe DL