Question: how common is it to get pregnant on nuvaring?
Answer: Effectiveness. The NuvaRing is 91 percent to 99 percent effective.9﻿ This means that with perfect use, less than 1 out of every 100 women who use the birth control ring will become pregnant in one year. With typical use, 9 out of every 100 women who use NuvaRing will become pregnant in one year.