- Presence of PCOS diagnosed based on the Androgen Excess Society criteria. All subjects must have hyperandrogenism (hirsutism and/or hyperandrogenemia), ovarian dysfunction (oligoanovulation and/or polycystic ovaries), and exclusion of other androgen excess related disorders. Oligomenorrhea is defined as an intermenstrual interval >35 days or <8 menstrual bleedings in the past year. Amenorrhea is defined as an intermenstrual interval >90 days. Clinical hyperandrogenism is defined as a Ferriman-Gallwey (FG) score ≥5