Until John R. Lee, M.D. came along with his best-selling book What Your Doctor May Not Tell You about Menopause, progesterone was the forgotten hormone. Now millions of women understand why lack of progesterone may be causing their hormone imbalance symptoms, and how to balance their hormones using natural progesterone cream. These articles (links listed below) about natural progesterone by Dr. John Lee and Virginia Hopkins can give women with PMS or menopause symptoms valuable guidance for achieving hormone balance.