Some birth control methods can affect bone health. For example, Depo-Provera, a birth control shot, can reduce bone density. This loss of bone density can increase the risk of osteoporosis and bone fractures later in life. The longer you use Depo-Provera, the higher the risk for irreversible bone loss. It's important to discuss with your doctor if you have other risk factors for bone loss before choosing this method. Birth control pills may also have a slight impact on bone health, but the risk is generally lower compared to Depo-Provera.