Uterine anomalies are categorized as abnormal uterine morphology, abnormal endometrial hyperplasia and secretion, including the presence of an abnormal uterine mass or fatty organisms in the uterine cavity, so the causes of uterine anomalies vary greatly depending on the specifics of the uterine anomalies. For example, abnormal uterine morphology, the most common is mediastinum uterus or stumpy uterus, which is caused by congenital growth and developmental abnormalities, also known as congenital uterine anomalies. In the case of endometrial hyperplasia secretion abnormality, it is caused by abnormal ovarian endocrine function, such as polycystic ovary syndrome or premature ovarian failure, dysfunctional uterine bleeding. Endometrial polyps are considered in the vast majority of women who have a bulge in the uterine cavity, which may be caused by chronic inflammatory stimulation in the uterine cavity, and may also be caused by abnormal hormone levels in the body. A mass in the uterus may be a fibroid caused by smooth muscle growth, or endometrial cancer caused by endometrial lesions.