MARLA AHLGRIMM, R.PH., is the founder and chair of Women's Health America (WHA) Group and cofounder of Madison Pharmacy Associates, Inc., the first pharmacy in the United States devoted entirely to women's health care. Ms. Ahlgrimm was one of the first health professionals in the United States to recognize, define, and develop treatment options for premenstrual syndrome (PMS). JOHN M. KELLS is the cofounder and chief executive of Aeron LifeCycles Clinical Laboratory, a leader in research on the impact of hormones on breast cancer and women's health. CHRISTINE MacGENN RODGERSON is a writer and editor who specializes in scientific, health, and medical issues.