If a woman has irregular menstruation, it is most accurate that she should register with an endocrinology gynecologist. However, some hospitals do not have such a detailed division, so it is generally recommended to register with gynecology first. Because menstrual disorders are mostly counted as gynecological diseases of women, it is more accurate to call the gynecology department. There are many causes of menstrual disorders in women, such as bad mood, excessive weight loss, polycystic ovary syndrome, uterine fibroids and so on, all of which may cause menstrual disorders in women, so first go to gynecology department for investigation. Of course, some endocrine diseases can also cause irregular periods, such as hyperthyroidism, hypothyroidism, etc.