Clinical performance and menstrual bleeding patterns with three dosage combinations of a Nestorone progestogen/ethinyl estradiol contraceptive vaginal ring used on a bleeding-signaled regimen

Reference

Weisberg E, Brache V, Alvarez F, Massai R, Mishell DR Jr, Apter D, Gale J, Sivin I, Tsong YY, Fraser IS, 2005, Clinical performance and menstrual bleeding patterns with three dosage combinations of a Nestorone progestogen/ethinyl estradiol contraceptive vaginal ring used on a bleeding-signaled regimen, Contraception, 72(1) 46-52