Osteoporosis is a condition that leads to weak and fragile bones, commonly seen in older adults, especially women. Hormone replacement therapy (HRT) is a common treatment method that involves supplementing estrogen and/or progesterone to help slow down bone loss. After menopause, women's estrogen levels drop, leading to reduced bone density. HRT can effectively increase bone density and reduce the risk of fractures. However, HRT also comes with certain risks and side effects, such as an increased risk of certain cancers and cardiovascular diseases. Therefore, doctors will weigh the pros and cons based on the patient's specific situation to determine whether to use HRT.