Read below. Endometrial cancer presents as spotting/bleeding in between periods, heavy periods, and postmenopausal bleeding. Risk factors include: obesity, early age of menstruation, late age of menopause, never having carried a pregnancy (nulliparous women), ovarian disease that leads to an imbalance of estrogen and progesterone, tamoxifen use, and genetic predisposition.
Www.cancer.net. Here is a good patient resource on uterine cancer, including risk factors. http://www.cancer.net/cancer-types/uterine-cancer/risk-factors-and-prevention.