When someone starts a new hormonal birth control method for the first time, they need to use a back-up method or abstain for the first week. After that first week, the hormones are integrated into the body and will start to protect against pregnancy.
After that week, Nexplanon protects against pregnancy up to 99% for 3 years.
If you replaced the Nexplanon before it expired, you would not need to use a backup method. If you replaced it after it expired, you would need to use a backup method for 1 week before it is effective.
Remember, hormonal birth control methods do not protect against STI’s. Only condoms and dental dams can protect against STIs.
If you have any other questions or concerns, give our Teen Clinic a call! 303-442-5160