Serum Nestorone and ethinyl estradiol levels, and ovulation inhibition in women using three different dosage combinations of a Nestorone progestogen-ethinyl estradiol contraceptive vaginal ring on a bleeding-signaled regimen

Reference

Fraser IS, Weisberg E, Brache V, Alvarez F, Massai R, Mishell DR Jr, Apter D, Gale J, Tsong YY, Sivin I, 2005, Serum Nestorone and ethinyl estradiol levels, and ovulation inhibition in women using three different dosage combinations of a Nestorone progestogen-ethinyl estradiol contraceptive vaginal ring on a bleeding-signaled regimen, Contraception, 72(1) 40-5