Copper IUD vs hormonal IUD?
Last updated September 3, 2026.
The copper IUD is hormone-free and lasts up to 10 years; hormonal IUDs release progestin, last 3 to 8 years, and usually lighten or stop periods. Effectiveness is excellent for both: 0.1 to 0.4% typical-use failure for hormonal IUDs and 0.8% for copper. The lived differences are hormonal exposure and your period. Copper changes no hormones anywhere in your body, but periods often get heavier and crampier, particularly in the first months. Hormonal IUDs use a small local dose of progestin, and most users end up with light periods or none at all. Copper has two unique strengths: it is the most effective emergency contraception available when placed within 5 days of unprotected sex, and it is the only top-tier method for people avoiding hormones. Pick copper if hormone-free is the point or you want the full decade. Pick hormonal if period relief matters and progestin is acceptable. Both are placed and removed by a clinician, both are immediately reversible, and neither protects against STIs.
What to do
- Decide on hormones first: that single question usually settles the choice.
- Map to your periods: heavy or crampy already? Hormonal likely helps, copper likely worsens.
- Check the timeline: copper up to 10 years; hormonal 3 to 8 years depending on the device.
- Remember the EC trick: copper IUD placed within 5 days is the most effective emergency contraception.
- Plan for insertion day: both require a procedure; ask about pain management options ahead of time.
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