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Annovera, a recently approved contraceptive vaginal ring, the first that can be used for an entire year, is a highly effective birth control method, according to clinical trial data presented at ENDO 2019, the Endocrine Society’s annual meeting in New Orleans, Louisiana. According to the authors, the ring’s 97% success rate is comparable to the most effective birth control methods already on the market, which are at least 95% effective.
The self-inserted ring is left in place for 21 days and removed for 7 days in each cycle. It provides contraceptive efficacy for up to 13 cycles (1 year) of use. It is designed to release 150 mcg segesterone acetate and 13 mcg ethinyl estradiol per day and has a Pearl index, or failure rate, of 2.98.