Nuvaring contains the hormones estrogen and progesterone. It keeps the levels of these hormones at a constant level to prevent the eggs from maturing. When these hormone levels decrease and there is sloughing of the inner lining of the uterus you get your periods. If you miss the periods you may consider pregnancy in the following circumstances: if the ring was out for more than 3 hours during the 3 weeks of ring or you waited longer than 1 week to insert a new ring or you have left NuvaRing in place for longer than 4 weeks. It is best to consult a gynecologist and get yourself evaluated.
Best of luck and take care!
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.