The Nurses' Health Studies are among the largest and longest running investigations of factors that influence women's health. Started in 1976 and still running, the information provided by the thousands of dedicated nurse participants has led to many new insights on health and disease. The studies have produced landmark data on cancer prevention, cardiovascular disease, diabetes, and the effects of such lifestyle factors as diet and physical activity. However, there is still a great deal that is not known, especially regarding women from diverse ethnic backgrounds. The goal of the newest study, the Nurses' Health Study III, is to learn more about how women's lifestyles (including diet, exercise, birth control, pregnancy, work exposures, etc.) during their 20s, 30s, and 40s can influence health throughout life. Investigators at the Harvard Medical School and Brigham and Womens Hospital, are asking female nurses between the ages of 20 and 46 to join this study. Click here for more information.