Two things...I am not a professional so just guessing here and also I wasn't sure whether you are still taking meds or just that you have in the past? I would personally be hesitant to use meds with wild yam because my research describes wild yam as a liver tonic among other things. I would be concerned about the liver become healthier and cleansing your body of the meds before they can do fully what they need. Now if you are not on any meds then I think Wild Yam could help you. I am not familiar with Cyclogest so I don't know which would be better for you. I take wild yam throughout my cycle but some women feel it can delay O if taken pre o so if that concerns you then I would stick to post O. Herbs are often used in conjunction with other herbs because they all work to nourish different areas of your body and in most health situations many body organs can be affected (we all know that to be true for PCOS) so you might not get the best results using it alone. A friend on another board recommends a great women's herbal combo called Female Harmony. It is available through Crystal Star and has herbs for the liver, the repro system, hormone balancing and general health. You might want to look into something like that along with the wild yam. Herbs do tend to take awhile to work and there are sometimes cleansing type side effects -headaches, nausea, acne, maybe menstrual changes.
Hope something here helps you. There are lots of good books available on the subject of herbs for women's health if you are interested.

Sheri