Progesterone is secreted by the ovaries and reduces symptoms of premature menstrual syndrome. It protects against uterine and breast cancers, osteoporosis, fibrocystic disease and ovarian cysts. It dramatically decreases menopausal symptoms. Most U.S. physicians prescribe synthetic progestins which cause side such side effects as bloating, headaches, fatigue and weight gain. The natural progesterone must be prescribed in place of the synthetic progestin to avoid the side effects and protect against cancer. We emphasize the use of natural hormones and not synthetic hormones, which have proven time and time again to cause significant side effects.