Implanon is about the size of a thin matchstick. It contains a hormone called etonorgestrel. Most users have it inserted under the skin of their upper arm, not far above the elbow. The ‘match’ can easily be felt, but it’s not very visible – except to someone who is looking for it. There will be a tiny scar at the point where the device was inserted, but unless something has gone wrong, this shouldn’t be very visible either. Because of the local anaesthetic, there should be very little pain. Implanon is inserted during the first five days after the start of the period – mainly to ensure that the woman is not pregnant.
Implanon lasts for three years, after which it runs out of hormone. It releases a steady stream of a female-type hormone into the bloodstream. The hormone reaches the ovaries, and prevents them from releasing eggs. It also causes some minor anti-conception changes in the womb lining and in the cervix. It requires a properly trained gynaecologist to perform the insertion and removal. It is at least 99 per cent effective.
Most women who want to use an implant can have one fitted. But it may be unsuitable if:
Possible side-effects include although not common include: