Contraceptive injection 
What is it?
It's an injection of hormones that provides a longer-acting alternative to the pill. It works by slowly releasing the hormone progestogen into the body to stop ovulation. Each injection lasts for 8-12 weeks. Injections may reduce heavy or painful periods and may give some protection against cancer of the uterus.

Advantages:

• unlike the pill you don’t need to remember to take a tablet every day
• doesn't interfere with the spontaneity of sex

Considerations:

• periods can become irregular or stop altogether
• it can take over a year for fertility to return to normal after stopping contraceptive injections, so if you're planning to start a family in the near future, it may not be suitable
• it's important to remember to attend your appointments on time every 8-12 weeks, otherwise contraceptive cover can stop
• injections don't offer protection against sexually transmitted infections or HIV/AIDS

How effective?

• 99%