Injectable Contraception

The contraceptive injection, also known as ‘the jab’ or ‘the shot’ contains progestogen.

It is a prescription-only method and a long-term reversible method of contraception. There is only one type is available in Ireland, it is called Depo Provera and is effective for 12 weeks.

The hormone is injected into a muscle, usually during the first five days of a period, and is released very slowly into the body. Further injections are needed every 12 weeks. Discuss with your doctor the best time to have your first injection.

The injection acts primarily by preventing the ovaries from releasing an egg (ovulation). Less often it works by thickening cervical mucus to prevent sperm from joining an egg or by altering the lining of the uterus, which may prevent implantation of a fertilised egg.

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