Studies show bone loss is a major problem for many women after menopause. Bone loss increases after age 40 and gets worse as women age.

Scientists aren't sure why bone loss gets worse after menopause. It may occur when levels of the hormone estrogen drop with menopause. Other factors may include age, poor nutrition, or decreased physical activity.

Researchers are hard at work trying to understand osteoporosis. To find out more about this condition, see the National Osteoporosis Foundation (NOF) web site at: http://www.nof.org.