Conditions: Contraception
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 666
Healthy volunteers: yes

Brief summary:
The primary objective of this trial was to identify at least one next generation ring (NGR) that demonstrates inhibition of ovulation (which was considered confirmed if in the subset of participants ovulation was observed in less than 15% of the participants at any time during the 3 treatment cycles of the study) and cycle control that was non-inferior to NuvaRing®, as judged by the incidence of breakthrough bleeding and/or spotting (BTB-S) during Cycle 3. The primary hypothesis was that at least 1 of the 6 NGRs would show inhibition of ovulation and cycle control during Treatment Cycle 3 that is non-inferior to NuvaRing®, as judged by the incidence of BTB-S.

Detailed description:

Arms:
arm 1: Participants will receive nomegestrol acetate 17β-estradiol (NOMAC-E2) 500/300 μg for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 2: Participants will receive nomegestrol acetate 17β-estradiol (NOMAC-E2) 700/300 μg for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 3: Participants will receive nomegestrol acetate 17β-estradiol (NOMAC-E2) 900/300 μg for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 4: Participants will receive etonogestrel 17β-estradiol (ENG-E2) 75/300 μg for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 5: Participants will receive etonogestrel 17β-estradiol (ENG-E2) 100/300 μg for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 6: Participants will receive etonogestrel 17β-estradiol (ENG-E2)125/300 μg for three 28-day treatment periods, each treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days. arm 7: Participants will receive NuvaRing® (etonogestrel-ethinyl estradiol \[ENG-EE\] 120/15 μg) for three treatment periods, each 28-day treatment period (cycle) consisting of 21 days of vaginal ring use followed by 7 vaginal ring-free days.

Interventions: intervention 1: Nomegestrol acetate (NOMAC) intervention 2: Etonogestrel (ENG) intervention 3: Ethinyl estradiol (EE) intervention 4: Estradiol (E2)
Intervention descriptions: intervention 1: Daily release of 500, 700, or 900 μg. intervention 2: Daily release of 75, 100, 120 or 125 μg intervention 3: Daily release of 15 μg intervention 4: Daily release of 300 μg

Protocol document: