An intrauterine device (IUD) is highly effective as a form of birth control, with an effectiveness rate of over 99%. This means fewer than 1 out of 100 people using an IUD will get pregnant each year
Key points about IUD effectiveness:
- IUDs work immediately once inserted and can last between 3 to 12 years, depending on the type (hormonal or copper)
- The copper IUD can also be used as emergency contraception if inserted within 5 days after unprotected sex, with an effectiveness of more than 99.9% at preventing pregnancy in that context
- IUDs are considered almost mistake-proof since they do not rely on daily user action, unlike pills or condoms
- Both hormonal and non-hormonal IUDs maintain high effectiveness over their lifespan
- While IUDs are very effective at preventing pregnancy, they do not protect against sexually transmitted infections (STIs)
In summary, IUDs are among the most effective reversible contraceptive methods available, providing long-term, reliable pregnancy prevention with minimal user effort
