how often do you change your nuvaring?
Wear the ring for 3 weeks (21 days), 4 weeks (28 days), or 5 weeks (35 days). Then take out your old ring and put in a new ring. Change your ring on the same day of the week every time — so if you put your ring in on a Monday, change it every 3, 4, or 5 weeks on a Monday.