HOW DOES THE RING WORK?
The estrogen and progestin hormones are similar to the natural hormones produced by the ovaries. The progestin component is absorbed in small amounts and prevents the ovary from releasing an egg (ovulation). The uterine lining also becomes thinner than usual, which would inhibit implantation of a fertilized egg. In addition, the cervical mucus also becomes thicker and this helps prevent sperm from entering the uterus. When properly placed, the ring is held in place by the vaginal muscle structure, even during exercise or intercourse. The NuvaRing® cannot “get lost” in the vagina. The vagina is flexible, but no longer than the palm of your hand. The cervix forms the back wall of the vagina so the ring remains in the vagina. HOW EFFECTIVE IS NuvaRing®? According to studies provided to the Food and Drug Administration (FDA) during the approval process, effectiveness ratings are listed at 99% when used according to label instructions. This is comparable to the patch and better than the Pil
