Endometrial polyps require an ultrasound examination to be detected, as they are located within the uterine cavity and cannot be seen by a gynecological examination alone. Under ultrasound, one can see a polyp-like object in the uterine cavity, which usually measures only a few millimeters, although some may be about ten or more millimeters in size. Certainly, if possible, a hysteroscopy can also identify them. However, generally, an ultrasound is conducted first to observe the endometrial polyps, followed by a hysteroscopy to remove them.