The most common warning sign of uterine cancer is any kind of abnormal bleeding. Vaginal bleeding after menopause, which is known as post-menopausal bleeding, is the most common symptom of uterine cancer. This can be of any amount, from simple spotting to heavy vaginal bleeding, and this can occur at any time after natural menopause. No matter how long or how much, any post-menopausal bleeding is considered abnormal. For premenopausal women, irregular or very heavy menses may also be a symptom of endometrial cancer. Although most commonly, it is due to non-cancerous conditions. Sometimes women with uterine cancer can also experience pelvic pain, bloating, or cramping, but these symptoms are less common.