The softening of bone mass and the widening of the bone canals. This occurs with both age and diminished physical activity. Since women live longer, they are more likely to show such signs. (WARNING! Tirade Ahead!) There is little doubt that the condition is increasing among American women, and is starting to show itself at an earlier age. This is called "improved diagnostic methods" (harumph). The statistics that show the rise to be strongest in women that have used steroid hormone therapies in their earlier years seems to have escaped the notice of current Medical Conventional Wisdom. This states that ALL women need medical care against osteoporosis going into menopause, and the primary treatment is...steroid hormones (this year, at least).