Dear Reader; Make her your wife first. The manufacture says seven days. Condoms are not effective protection against any thing so toss that idea. Dwight They will work together to reduce the chance for pregnancy, because they're mutually exclusive methods of preventing. The first line of defense is a physical barrier, the condom, of which there is a +90% chance of preventing pregnancy in one year of use. If that fails, then you have the second line of defense, which is the hormonal barrier that the NuvaRing provides. With another +90%(~98%) chance of preventing pregnancy, you have a total protection rate of 98.98% chance of preventing pregnancy.