Estrogen helps reduce the rate of bone loss that occurs during normal bone remodeling. Normally there is a balance in the activity of the cells that break down bone and the cells that build it back up. By decreasing the activity of the cells that break down bone, estrogen allows the cells that build bone to have a greater overall effect. Once estrogen levels drop, this balance shifts.
While hormone therapy has been shown to decrease hip and vertebral fractures, it may also increase your risk of other health conditions, such as invasive breast cancer, stroke and blood clots. Discuss the risks and benefits of available treatments with your health care professional.