The following Web sites may provide helpful information about osteopenia and postmenopausal osteoporosis:

National Institutes of Health, Osteoporosis and Related Bone Diseases—National Resource Center
www.osteo.org

National Institute on Aging (NIA)
www.nia.nih.gov

American College of Obstetricians and Gynecologists (ACOG)
www.acog.org

The National Osteoporosis Foundation (NOF)
www.nof.org

North American Menopause Society (NAMS)
www.menopause.org

Reports posted on the following Web sites provide recent findings on bone health and preventing osteoporosis:

Office of the Surgeon General
www.surgeongeneral.gov/reportspublications.html

Obstetrics & Gynecology, The Journal of the American College of Obstetricians and Gynecologists
www.greenjournal.org