hey lana,
pcos is polly systic overian syndrom- basically the body cant break down sugars and there are many little systs on the ovaries which look very similar to fertilized eggs so the body thinks your preg. so you get cravings and weight gain like a preg person. some other common side effects are iregular period and exessive hair growth. its not fun. the doc give you a med (usually metformin or glucafoge) wich helps the body break down the glucose and then when you diet you should lose weight like a regular person but she told me thats not the case for me at all.....