- The study aimed to analyze how well oestriol (E3) and trimegestone (TMG) are absorbed and work in the body when delivered via three different vaginal rings over 21 days, each with varying doses of E3/TMG.
- Thirty-five healthy women participated, receiving one of the three test rings, while blood samples measured hormone levels and safety was monitored through adverse events.
- Results showed that the third test ring provided the best balance of E3/TMG for preventing bleeding and achieving contraception, with all rings being well tolerated by participants.