Side-by-side comparison
Implant vs hormonal IUD
Both are among the most effective reversible methods. The implant goes in the upper arm with a quick procedure; the IUD is placed in the uterus. Bleeding with the implant is less predictable, while the hormonal IUD more often makes periods lighter.
By the AltFTool health editorial teamLast reviewed Checked against WHO, CDC and NHS guidance
Key differences
| Feature | Implant | Hormonal IUD |
|---|---|---|
| Typical-use effectiveness | Over 99% | Over 99% |
| Perfect-use effectiveness | Over 99% | Over 99% |
| Hormones | Progestogen | Progestogen |
| How long it lasts | 3 years on the US license; UK guidance now supports up to 5 years | 3 to 8 years, depending on the brand |
| Protects against STIs | No | No |
| Needs a clinician to start | Yes | Yes |
| Daily or every-time action | No | No |
| You can stop it yourself | No | No |
| Fertility after stopping | Quickly after removal | Quickly after removal |
| While breastfeeding | Yes | Yes |
| Effect on periods | Bleeding often becomes irregular or unpredictable; some people stop bleeding altogether. | Periods usually become lighter and less painful, and many people stop bleeding, though spotting is common in the first months. |
Read each guide
Contraceptive implant
People who want highly effective, long-lasting contraception without daily effort, including those who cannot take estrogen.
Hormonal IUD
People who want very effective, long-lasting contraception, especially those with heavy or painful periods or who cannot take estrogen.
FAQ
Which is more effective, implant or hormonal iud?
Both are among the most effective reversible methods. The implant goes in the upper arm with a quick procedure; the IUD is placed in the uterus. Bleeding with the implant is less predictable, while the hormonal IUD more often makes periods lighter.
Does the implant or hormonal iud protect against STIs?
Neither does. Use condoms as well if you need protection from sexually transmitted infections.
Can I switch from the implant to the hormonal iud?
Usually yes. A clinician or pharmacist can tell you when to start the new method and whether you need extra protection (such as condoms) for a few days while switching.
More comparisons
Sources
Reviewed 1 November 2026. We link to the guidance itself so you can check it.