NuvaRing Contraceptive

NuvaRing® (etonogestrel/ethinyl estradiol vaginal ring) is a form of birth control that is available by prescription only. It comes in the form of a small, flexible ring that is inserted into the vagina once a month.
NuvaRing works like combined oral contraceptives (birth control pills that contain both an estrogen and a progesterone). Mostly, it prevents pregnancy by stopping ovulation (the maturation and release of eggs from the ovaries). However, it also prevents pregnancy by altering the cervical mucus (making it more difficult for sperm to enter the uterus) and the lining of the uterus (making it less receptive to an embryo).
NuvaRing was shown to be an effective birth control method in three large clinical trials. In these studies, for every 100 women who used it for a year, one or two became pregnant. This is very effective, compared to many other methods of contraception. For instance, as many as 14 percent of women using condoms for a year will become pregnant.
(Click NuvaRing for more information on how the vaginal ring works as a contraceptive, to find out how to use the NuvaRing, and to learn about the side effects associated with this method of birth control.)
Last reviewed by: Kristi Monson, PharmD
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