What should you know about a subcutaneous contraceptive implant?

The rod releases a progestogen into the body. This mainly prevents ovulation and also changes cervical mucus, making it harder for sperm to pass. A clinician numbs the skin before inserting the rod through a small opening on the inner upper arm. It can be felt under the skin, but it should not be deeply embedded.

Bleeding patterns can change after insertion. Some people have irregular spotting, longer bleeding, lighter bleeding, or no bleeding. These changes do not by themselves show whether the implant is working. The implant does not protect against sexually transmitted infections, so condoms may still be useful.

Keep the insertion area clean and follow the clinician’s dressing instructions. Once tenderness settles, gently check that the rod remains in place. Do not try to move or remove it yourself. Tell the clinician about medicines, supplements, or herbal products you take, because some can reduce hormonal contraception’s effectiveness.

Arrange removal or replacement with a trained clinician when advised, or earlier if you want a different method. Fertility can return after removal, although timing differs between people. Discuss your health history, bleeding preferences, and other contraception options, including the [Etonogestrel Implant Rod](/materials/etonogestrel-implant/) and [Hormonal Coil](/treatments/contraception-and-family-planning/hormonal-coil/).

Contact the clinic promptly if the arm becomes increasingly red, hot, swollen, very painful, or starts draining fluid. Seek urgent medical help for severe allergic symptoms, sudden chest pain, breathlessness, or one-sided leg swelling. Arrange a review if you cannot feel the rod, it appears to have changed position, or pregnancy is possible.

Ask which medicines could interfere with the implant, what bleeding changes to expect, how to check its position, and when removal or replacement should be planned.