There are usually a dozen to two dozen follicles in polycystic ovaries, but they are immature and do not ovulate normally. The cause of polycystic ovary syndrome is not well defined and may be the result of a combination of congenital genetic dysfunction and acquired environmental factors. Polycystic ovary patients with anovulation, infertility and obesity, hirsutism as a common clinical manifestation, middle-aged and elderly patients will also appear metabolic disorders, such as hypertension, diabetes mellitus and so on. When patients with polycystic ovary syndrome undergo transvaginal ultrasound examination, there are usually multiple follicles in the ovary on the affected side, about a dozen to two dozen, with a diameter of 2-9mm, and the follicles are mostly around the edge of the ovary in a wheel-like arrangement. These follicles in the ovary are immature and cannot ovulate normally due to the hormone levels in the body, so they are prone to infertility; in addition, the patient’s ovaries are slightly enlarged in size. Patients with polycystic ovary syndrome can be clearly diagnosed through sex hormone six tests, transvaginal ultrasound and follicle monitoring. It is recommended to take active medication under the guidance of gynecologist to restore normal menstrual cycle and ovulation function.