About the injection
If used correctly, the contraceptive injection is more than 99% effective at preventing pregnancy. It lasts for 13 weeks (or eight weeks depending on the type), so you don't have to think about contraception every day or every time you have sex.
The injection can be useful for women who might forget to take the contraceptive pill every day and for those who can't use contraception that contains oestrogen. It's not affected by medication.
There are three types of injection:
- DepoProvera - usually given into a muscle in your bottom, although sometimes it may be given in the muscle in your upper arm.
- Sayana Press - usually given under the skin in your stomach or thigh. You might be able to give this injection yourself at home.
- Noristerat is not commonly used in the UK and protects you for eight weeks.
Side effects can include weight gain, headaches, mood swings and breast tenderness. Your periods will probably change - most often periods stop completely. Some women will have irregular periods or spotting (bleeding between periods) and a few will have periods that last longer and are heavier.
It can take up to one year for your fertility to return to normal after the injection wears off, so it may not be suitable if you want to have a baby in the near future.
How the injection works
If you have the injection during the first five days of your cycle, you will be immediately protected against becoming pregnant. If you have the injection on any other day of your cycle, you will not be protected against pregnancy for up to seven days. Use condoms or another method of contraception during this time.
Where you can get the contraceptive injection
If you think the injection is the right contraception choice, you can:
- book a telephone consultation to discuss this with one of our clinical team
- make an appointment online to come into one of our clinics
- visit any of our walk-in and wait clinics*
If you need to bring your child/children with you to your appointment we recommend you bring another adult with you to care for them.
*Please note our walk in and wait slots are limited and can occasionally incur a 2 hour wait.
Download the Family Planning Association’s Your guide to the contraceptive injection.