A form of hormonal birth control. The NuvaRing is a soft, flexible and transparent ring that prevents pregnancy when inserted into the vagina, up near the cervix. It releases a combination of hormones, and is 98-percent effective at preventing pregnancy with perfect use. NuvaRing is worn inside the vagina for three weeks and then removed at the beginning of the fourth week, then a new one is inserted a week later. It must be prescribed by a health care provider. It does not protect against sexually transmitted diseases. To learn more, visit the NuvaRing website.