Hi Sheena, it is supposed to be very effective, I took it for a few months to try and prevent pre AF spotting but it didn't work but I don't have PCOS - it is however a very powerful thing so don't just take it without advice, and if you do, it should only be taken for a maximum of 3 months - if you don't see any results don't use it anymore.
If you want any more advice on it, it would be worth seeing a holistic therapist that specializes in fertility, your doctor will likely not have a clue but they will and can advise you on usage. My fertility acupuncturist was who gave it to me x good luck! x