Why does osteoporosis affect women more often than men?

This disorder weakens bones, leaving them vulnerable to breaking even without a serious fall or other trauma. Postmenopausal women are twice as likely as men the same age to have an osteoporotic fracture, because they have less bone tissue and because bone loss is accelerated by the decline in estrogen at menopause. And because women are living longer than ever, osteoporosis is a significant cause of disability in women later in life.