In the appendix in the back of the book, Richard Bernstein M.D. has a large article on PCOS. It is in his book "THE DIABETES SOLUTION." HE has lectures on YouTube. He explains why INSULIN RESISTANCE causes PCOS and why it is so difficult to lose weight when you have it. He recommends Metformin be taken since he says all obese people are Insulin Resistant and in time will develop Type 2 diabetes.
He's had Type 1 since he was 12 and he is 78 now. I got the book at the College Library. I recommend reading it and that article. www.amazon.com/Dr-Bernsteins-Diabetes-Solu