When you first start the Nuva Ring, you can either start it on your first day of your menstrual cycle, or your 5th day
on your menstrual cycle. If you start it
on the first day of your menstrual cycle, you will be safe immediately, provided you dont have sex during your cycle. If you start the Ring on the 5th day of your cycle, then you have to wait 1 week until you are completely covered.
Once you start your birth control, you keep the ring inside of your vagina for 3 weeks straight.