Annovera and Nuvaring are quite similar, they are both vaginal rings that use hormones to prevent pregnancy. One big difference is how each of these rings are used. Annovera is a yearly ring that is meant to be washed and reused every month, whereas Nuvaring is monthly, meaning you will dispose of the ring at the end of your 21 day usage. Annovera may require a bit more upkeep than Nuvaring, but it also means less trips to the pharmacy because you only need one ring for the entire year.
Another big difference between Annovera and Nuvaring is the hormones used. Both Annovera and Nuvring contain the same estrogen: ethinyl estradiol. But, they do not contain the same progestin. Annovera contains segesterone acetate whereas Nuvaring contains etonogestrel. In short: Annovera is a combination of segesterone acetate and ethinyl estradiol while Nuvaring is a combination of etonogestral and ethinyl estradiol. Both of these hormones will effectively prevent pregnancy, hormones effect everyone differently so it’s just a matter of figuring out which progestin gives you less side effects.