Abstract: Polycystic ovary syndrome（PCOS） is the most common endocrinopathy in women. PCOS often occurs in perimenarcheal girls，and similarities between the physiological changes of puberty and the pathological features of PCOS have been noted. The diagnosis of adolescent PCOS should simultaneously meet the three indexes of Rotterdam Consensus，hyperandrogenism as hyperandrogenemia（elevated blood androgens found using sensitive assays），oligo-amenorrhea for at least 2 years after menarche, and polycystic ovaries also including increased ovarian volume（＞10 cm3）. Although metabolic syndrome is not included in the diagnosis of PCOS，metabolic condition in adolescent PCOS patients should be considered. Treatments of adolescent PCOS should include the modification of lifestyle and dietary，improvement of metabolic disorders，and restoration of cyclical menses.

Key words: Adolescent, Puberty, Polycystic ovary syndrome, Diagnosis, Therapy