The birth control injection, or progestin injection, is given every 10-13 weeks into the muscle of the arm or buttocks.
With perfect use the shot is 99.7% effective in preventing pregnancy.
Available through the Sexual Health Clinic for $15. Prices are subject to change without notice. Please call ahead for up-to-date prices. Contact your local health unit office for information about payment options. Condoms are available at no charge.
How it works
- Prevents the ovary from releasing an egg.
- Thickens the cervical mucus making it difficult for sperm to get to the egg.
- Changes the lining of the uterus making implantation difficult.
The shot and bone health
- Safe, simple and convenient.
- Provides very effective, long-lasting pregnancy protection.
- Only required 4 times per year.
- Does not contain estrogen.
- May stop or decrease periods.
- May reduce period cramps.
- May reduce your risk of certain kinds of cancer.
Learn more about how the birth control injection can affect your bone health and how you can minimize the impact.
Late or missed injection
If you are late for your next injection, you are at risk for pregnancy. Use condoms or abstain from sex until you can see your health care provider. Consider the emergency contraceptive pill (ECP) if you have missed an injection and have sex without a condom or if the condom breaks.
Hormonal birth control and STIs
The birth control injection protects against pregnancy, not STIs or HIV/AIDS. It is best to always use a condom when having sex even if you are using birth control. Free condoms are available through the Northwestern Health Unit.