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HealthInfo West Coast-Te Tai Poutini

Contraceptive injection (Depo-Provera)

The contraceptive injection contains the hormone progestogen, which works by stopping your ovaries releasing an egg. It's very effective (97% to 99%) in preventing pregnancy.

You need to have an injection every 12 weeks.

You may get irregular or long periods, which usually improves after six to 12 months. Most women will have no bleeding at all when using the contraceptive injection.

You may put on weight or lose weight. There's a small change of bone thinning, which improves once you stop using it.

You may not be able to get pregnant for six to 12 months after stopping the contraceptive injection.

See your GP to find out if the contraceptive injection is right for you. If you're under 25, sexual health consultations may be free through your general practice. Check with your practice to see if you're eligible.

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Written by HealthInfo clinical advisers. Last reviewed February 2019. Last updated July 2019.

Page reference: 603767

Review key: HICAS-53138