[medical-dictionary.thefreedictionary.com] osteoporosis [medical-dictionary.thefreedictionary.com] [medical-dictionary.thefreedictionary.com] [medical-dictionary.thefreedictionary.com] [medical-dictionary.thefreedictionary.com] women can lose up 20% of their bone mass [medical-dictionary.thefreedictionary.com] [medical-dictionary.thefreedictionary.com] osteoporosis [medical-dictionary.thefreedictionary.com] [medical-dictionary.thefreedictionary.com] porous bones [medical-dictionary.thefreedictionary.com]