Contraceptive implant

Implanon® is a contraceptive implant and is a small plastic rod, about the size of a matchstick, which is inserted just under the skin on the inside of a female’s upper arm. The rod slowly releases a female hormone called progesterone into the bloodstream over a period of 3 years. Implanon® won't protect you against sexually transmitted infections (STIs). It's a good idea for both partners to have an STI test before having unprotected sex (sex without a condom), even if the girl has Implanon®.

Implanon® works in 3 ways, it:

  1. temporarily prevents ovulation (an egg from being released from the ovaries every month)
  2. temporarily thins the lining of the womb (uterus) to prevent a fertilised egg from attaching to it
  3. thickens the discharge (juices) from the cervix to help stop sperm from reaching the womb (uterus).

When the rod is inserted correctly by a doctor, Implanon® is 99% effective in preventing pregnancy.


  • Convenient – you don't have to remember to take anything.
  • Lasts for a long time – 3 years.
  • Effective.
  • Easily removed.


  • Does not protect against STIs, protection such as condoms must be used.
  • Alters the menstrual cycle which causes irregular periods and spotting through the cycle.

Implanon® costs approximately $40 every 3 years for Medicare card holders plus the cost of insertion by your doctor.

You can get Implanon® from your doctor or sexual health clinic.



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