An endometrium of 1.2cm is not necessarily cancerous, but can also be normal, endometrial hyperplasia, endometrial polyps etc. The thickness of endometrium is the thickest in the days before women’s menstruation, and it can also reach 1.2 cm. In addition, endometrial hyperplasia, endometrial polyps and other conditions can also be manifested as thickening of endometrium in ultrasound, so endometrium with 1.2 cm may not necessarily be a manifestation of endometrial cancer. Clinical manifestations of endometrial cancer patients may be postmenopausal vaginal bleeding, and those who are not menopausal may have increased menstrual flow, prolonged menstrual period, or menstrual disorders, etc. Once the above situation occurs, one should consult the doctor in time so as to avoid delaying the condition.