Depo-Provera is a form of birth control that is administered as an injection in the muscle of the buttocks or arm every 12 weeks. It contains the hormone medroxyprogesterone acetate, which is a synthetic form of progesterone.

The Depo-Provera shot works by preventing ovulation, thickening the cervical mucus to prevent sperm from entering the uterus, and thinning the lining of the uterus to make it less hospitable for a fertilized egg to implant. It is a highly effective form of birth control, with a failure rate of less than 1% when used correctly.

Depo-Provera may also be used to treat certain conditions such as endometriosis, and to reduce the risk of certain cancers such as endometrial cancer.

Possible side effects of Depo-Provera include irregular menstrual bleeding, weight gain, headaches, mood changes, decreased sex drive, and bone density loss. It is not recommended for women who are pregnant or breastfeeding, or who have a history of certain health conditions such as liver disease or breast cancer.

If you are considering using Depo-Provera as your method of birth control, it is important to discuss the potential risks and benefits with your healthcare provider to determine if it is the right choice for you.