Use of depo-subQ provera 104 may cause you to lose calcium stored in your bones. The longer you use depo-subQ provera 104 the more calcium you are likely to lose. The calcium may not return completely once you stop using depo-subQ provera 104.
Loss of calcium may cause weak, porous bones (osteoporosis) that could increase the risk that your bones might break, especially after menopause. It is not known whether your risk of developing osteoporosis may be greater if you are a teenager when you start to use depo-subQ provera 104.
You should use depo-subQ provera 104 long-term (for example, more than 2 years) only if other methods of birth control or other treatments for endometriosis pain are not right for you.
Depo-subQ provera 104 does not protect you from HIV (AIDS) and other infections spread through sex (STIs).