The contraceptive injection is a method of contraception.

The contraceptive injection contains 1 hormone. The hormone prevents an egg cell from getting ready for ovulation. It also makes it more difficult for sperm cells to enter the uterus and prevents implantation of an egg cell. 

Contraceptive injection

How does the contraceptive injection work

The injection works for 3 months. It is used in the following way:

  • At the start of your cycle, a doctor or gynaecologist gives you an injection in your upper arm or buttock
  • After 10 weeks, you go back to have a second injection.
  • From that moment on you have a new injection every 3 months (12 weeks). 
Doctor giving a contraceptive injection in a woman's buttocks or upper arm


The contraceptive injection is very reliable if used correctly.

Does not affect your health

The contraceptive injection contains 1 hormone. This hormone does not generally affect your health.
In some cases, however, it is better to choose another method of contraception. For example if you have a very high risk of getting a heart diseaseAsk a doctor for advice.

The injection does not make you less fertile. If you want to get pregnant, you simply do not have the injection renewed. It can, however, take a few months, or up to a year, for your cycle to return to normal.

You may have some side-effects such as headaches, irregular menstrual periods and tender breasts. Consult a doctor if the side-effects are severe.

Your menstrual periods can become less heavy and often stop altogether.

Protection against STIs and HIV

The contraceptive injection does not protect against STIs or HIV. Only a condom can protect you.

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