PCOS and Metformin

I was quite surprised to find out recently that Metformin is a drug given to people with Diabetes and I couldn't understand how this would help me!
After all ...How is Polycystic Ovarian Syndrome anything like Diebetes? 
I began reading about it on the net to gain a better insight into what exactly I was taking as I didn't want to be given something that I don't need.

So in a nutshell: PCOS sufferers frequently have insulin resistence, which means that their bodies do not respond quick to insulin. (Insulin is a hormone created by the pancreas!) ........it's quite in depth so I have added some links below if you'd like to read more for yourself!

I guess I just have to trust my doctor on this one and take the tablets, from what I have read Metformin and Clomid taken together increase the chances of ovulation and concieving greatly!

 
http://women.webmd.com/metformin-glucophage-for-polycystic-ovary-syndrome

http://pcos.about.com/od/hormones/f/Insulin.htm

http://www.advancedfertility.com/metformin-pcos-pregnancy.htm