1. Menopause Drug Tied to Breast Cancer Recurrence - US News and World Report
Dutch study of tibolone, also used for osteoporosis but not available in U.S., was stopped early due to increased risk

2. Menopause : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
Menopause is a natural event that normally occurs between the ages of 45 and 55. Once menopause is complete (called postmenopause) and you have not had a period for 1 year, you can no longer become pregnant. The symptoms of menopause are caused by...• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Redmond, Washington ; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.