This is a test of commonsense. Complete the next sentence:

How to use the nuvaring
Do not use nuvaring if you have certain health conditions.
Discuss your complete medical history with your doctor when deciding whether to use nuvaring. Nuvaring is not safe for women who :
Smoke and are over 35.
Are at a high risk for blood clots, strokes, or heart attacks. Have uncontrolled high blood pressure.