A randomized study of the effect of mifepristone alone or in conjunction with ethinyl estradiol on ovarian function in women using the etonogestrel-releasing subdermal implant, Implanon®. - Weisberg E; Croxatto HB; Findlay JK; Burger HG; Fraser IS; Weisberg, Edith; Croxatto, Horatio B; Findlay, John K; Burger, Henry G; Fraser, Ian S (Contraception, 2011)