The birth control pill is highly effective at preventing pregnancy, with effectiveness rates depending on how consistently it is used. With perfect use, meaning taking the pill exactly as prescribed every day, it is over 99% effective. However, typical use, which accounts for occasional missed pills or delays, results in about 93% effectiveness. This means about 7 out of 100 women may become pregnant in a year with typical pill use. Factors that can reduce the pill's effectiveness include missing a pill, taking it late, vomiting or diarrhea shortly after taking it, and certain medications. To maximize effectiveness, it is important to take the pill consistently at the same time every day and follow the specific instructions for the pill brand used. In summary:
- Perfect use effectiveness: >99%
- Typical use effectiveness: ~93%
- Important to avoid missed pills, delayed doses, or interfering medications
- Does not protect against sexually transmitted infections (STIs), so additional protection like condoms is advised for STI prevention
This information is supported by multiple credible health sources including medical websites and health organizations.
