A. Polycystic ovaries. B. Oligo and/or anovulation C. Clinical (i.e acne, hirsutism) and/or biochemical signs of hyperandrogenism (i.e high levels of Testosterone, Androstendione, 17-hydroxyprogesterone, DHEA-S) and exclusion of other etiologies (congenital adrenal hyperplasia androgen-secreting tumors, Cushing's syndrome).