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HealthInfo Canterbury

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 or Family Planning Clinic to find out if the contraceptive injection is right for you.

Appointments at Family Planning Clinics are free for New Zealand residents if you're under 22. Sexual health consultations with your GP are free for people under 18 who are enrolled in a general practice in Canterbury.

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

Page reference: 54622

Review key: HICAS-53138