Contraceptive injections

Contraceptive injections are given every 12 weeks and are a safe and simple contraceptive.

A woman talking to a female doctor

What is a contraceptive injection?

A contraceptive injection is an injection that is given into the upper arm or buttock muscle every 12 weeks. Contraceptive injections contain the sex hormone progesterone, which inhibits ovulation.

The contraceptive injection available in Norway is called Depo-Provera.

Side effects

Irregular menstruation is often a side effect in the first few months. Eventually, menstruation often disappears completely. If you use a contraceptive injection for a longer period of time, menstruation is more likely to disappear.

Risks associated with the use of contraceptive injections

If you are in the risk group for cardiovascular disease, it may be best to choose other contraceptives that contain progesterone, such as a hormonal coil.

Contact your doctor or hospital immediately if you experience any of the following symptoms:

  • Pain or swelling in one leg or arm. These may be signs of a blood clot in one of the veins of the leg or arm (deep vein thrombosis).
  • Sudden breathing difficulties and severe chest pains. These may be signs of blood clots in the lungs (pulmonary embolism).
  • Difficulty lifting, smiling or talking. These may be signs of a stroke.

May take time to get pregnant

If you have been using contraceptive injections for a long time, it may take time for you to become pregnant. The reason for this is that the effect of the contraceptive injections can last after you stop using them. It may therefore take time for ovulation to start again. As a rule, it takes about half a year for ovulation to start again after you stop using contraceptive injections.

Olafia Clinic

Centre for counselling, examination and treatment of sexually transmitted infections at Oslo University Hospital. 

Sex og samfunn

Centre for youth sexuality. Sex og samfunn is a service for people under the age of 25 which provides guidance and prescriptions for contraception as well as the opportunity to get tested for sexually transmitted infections (STIs).

The public information channel for young people. 

The contraception guide in several languages

Overview of all contraceptives, available in Norwegian, English, Urdu, Polish, Somali, Arabic and Tigrinya.


Information about sex and cohabitation in Arabic, English, Farsi, French, Norwegian, Polish, Somali, Tigrinya and Turkish, aimed at immigrants and others with short periods of residence.

Content provided by Direktoratet for medisinske produkter (DMP)

Direktoratet for medisinske produkter (DMP) . Contraceptive injections. [Internet]. Oslo: The Norwegian Directorate of Health; updated Wednesday, September 22, 2021 [retrieved Monday, July 22, 2024]. Available from:

Last updated Wednesday, September 22, 2021