Polycystic Ovary Syndrome (PCOS)

Question: I have had irregular periods since I was 13. My primary care physician said it might take a few years for my cycle to be regular, but my OB/GYN recently diagnosed me with Polycystic ovaries and explained that is why my periods have been irregular. Could you explain to me what polycystic ovaries are and what I can do to treat them?