A baseline view of how a patient is metabolizing estrogens. Estrogens are essential for health and well being in both women and men. However, some oxidized estrogen metabolites have been shown to be harmful and potentially increase risk for breast cancer in women, and potentially prostate cancer in men. Because urine has the highest concentration of these estrogen metabolites compared to any other body fluid, urine has been the fluid of choice to monitor the estrogen metabolites.