Over 99% effective once the injection is given regularly
The injection contains the female hormone progesterone. An injection is given by a health care professional approximately every 12 weeks.
How it Works
The hormone progestogen is released very slowly into the body to prevent ovulation (an egg being released).
It is important that you talk to a doctor who will assess what contraceptive option is best for you.
- Does not interrupt sex
- May protect against cancer of the womb
- Useful for women who forget to take their pill daily
- Can be used by women who cannot take oestrogen in the combined oral contraceptive pill, such as women over 35 who smoke
- May cause irregular bleeding
- Injection must be given by a doctor or a nurse
- Nor suitable for long term use
- Cannot be immediately reversed in the event of side effects
- Can take time for regular periods and fertility to return to normal
- Does not protect against sexually transmitted infections