This study will be comparing women who have had endometrial cancer (cases) to women who have not had endometrial cancer (controls) in Harris County, Texas to better understand the risk factors for getting endometrial cancer. Insulin resistance is a condition of pre-diabetes. Polycystic ovarian syndrome (PCOS) is a condition associated with irregular periods, obesity, infertility, and/or difficulty in getting pregnant. Both insulin resistance and PCOS are believed to increase a woman's risk of getting endometrial cancer.