Anovulatory infertility in PCO is due to:

• A. alteration of folliculogenesis caused by dysregulation of GnRH pulse generator
• B. alteration of folliculogenesis caused by adrenal & ovarian hyperandrogenism
• C. alteration of folliculogenesis caused by insulin resistance
• D. alteration in folliculogenesis caused by alteration of ovarian growth factors
• E. all of the above