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The contraceptive implant

A matchstick-sized rod in your arm that works for 5 years.

Contraception4 min read

Written by the Splash teamSources checked

On this page 3 sections
  1. Quick answer
  2. The bleeding lottery
  3. Sources

Quick answer

  • Over 99% effective for 5 years.
  • Fertility returns straight away after removal.
  • Unpredictable bleeding is the main trade-off.
  • Doesn’t protect against STIs.

The implant is a small flexible rod, around 4cm long, placed under the skin of your upper arm. It releases progestogen to stop ovulation, and it’s one of the most effective methods available.

5 years
How long one implant works (NHS)See sources
  • Over 99% effective if replaced on time
  • Nothing to remember day to day
  • Can be removed any time; fertility returns straight away
  • Oestrogen-free

The bleeding lottery

Changes to periods are very common. Yours might get lighter, stop completely, become irregular with spotting, or – for some – heavier or longer. It can be unpredictable, but it’s not usually harmful.

Other reported effects include headaches, sore breasts, acne and weight gain, though the NHS says there isn’t enough evidence the implant causes these.

MythThe implant can travel around your body.
Fact

It can occasionally shift a few centimetres from where it was placed, which a clinician can sort out. It doesn’t wander off on adventures.

Sources

  1. NHS – What is the contraceptive implant?
  2. NHS – Side effects and risks of the implant
  3. NHS – How well contraception works at preventing pregnancy

Written by the Splash teamSources checked

This is general information, not medical advice. Splash can’t diagnose. If you’re worried, talk to a GP, pharmacist or sexual health clinic. In an emergency call 999 (UK) or 911 (US). How we write and check articles.

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