What Happens If You Take a Birth Control Pill Late?

Taking a birth control pill late reduces its effectiveness and increases pregnancy risk. If you're less than 12 hours late with combination pills or 3 hours late with progestin-only pills, take the missed pill immediately and continue your normal schedule. The CDC reports that typical use of birth control pills is 91% effective, but perfect use reaches 99% effectiveness. Being more than 12 hours late may require backup contraception for the next 7 days. Consistency is crucial because hormone levels must remain stable to prevent ovulation and maintain contraceptive protection.