Tag: Failure rate

With perfect use, the desogestrel-only pill is over 99% effective at preventing pregnancy. However, understanding what is the failure rate of desogestrel with typical, day-to-day use is crucial for maximizing its contraceptive effectiveness.

The effectiveness of levonorgestrel varies dramatically depending on its formulation, from an extremely low failure rate of just 0.1–0.2% for IUDs in the first year to a higher rate for emergency contraceptive pills if not taken promptly. Understanding **what is the failure rate of levonorgestrel** for each product is crucial for effective family planning and decision-making.

According to Planned Parenthood, Plan B and other levonorgestrel morning-after pills can lower the chance of getting pregnant by 75–89% if taken within 72 hours of unprotected sex, which means there is a notable failure rate. Understanding the specific factors that influence its effectiveness is critical for anyone relying on emergency contraception.