What new-fangled birth control ring?
You can even view the ad here!
http://www.nuvaring.com/consumer/global/tvcommercial.asp
And here's the "safety information" right on their home page:
IMPORTANT SAFETY INFORMATION
NuvaRing® does not protect against HIV infection and other sexually transmitted diseases. The use of combination oral contraceptives is associated with increased risks of several serious side effects, including blood clots, which may lead to stroke or heart attack. The risk of getting blood clots may be greater with the type of progestin in NuvaRing® than with some other progestins in certain low-dose birth control pills. It is unknown if the risk of blood clots is different with NuvaRing® use than with the use of certain birth control pills. Cigarette smoking increases the risk of serious cardiovascular side effects; women who use combination hormonal contraceptives are strongly advised not to smoke. For additional important information, please see NuvaRing® Prescribing Information.