PCOS

I forgot to mention this in the first post, but I was diagnosed with PCOS (polycystic ovarian syndrome) at the age of 15 (I'm 22 now). I'm not sure which causes which - does PCOS cause obesity or does obesity cause PCOS? They don't seem to be sure. When the doctor was diagnosing me she asked if I was overweight from a young age, because apparently that's one of the symtoms. It was only then that I realized I had been overweight from about 6 years of age. I was a very hyper child and my parents didn't like to keep junk food in the house, so how did I begin to get overweight? I do remember that I loved junk food, but I had very limited access to it so it wasn't like I ate lots of it. On the show Nick and Kate plus Eight, the wife has PCOS (hence the fertility drugs) and she's skinny. I've been told that if I lose enough weight, the symptoms of my PCOS will subside but it will still be there. I think maybe PCOS makes it more likely for a person to be overweight, and that being overweight exacerbates the PCOS. All I know is that they're still unsure about the causes :S