Hi there...I can understand the concerns you have for your friend. In pcos there will be hormonal imbalance. It will be difficult to lose weight easily. Ask her to maintain an adequate balance between diet and exercise. Diet should contain foods rich in fibres and proteins like vegetables, fruits, egg white and avoid sweets, curds as much as possible. And adequate excercises should also be done. Ask her not to overstrain herself. She should enjoy whatever she does. Losing weight is a gradual process. It will take time, patience and determination. Since you are staying in Delhi you can visits hospitals like aims, maulana azad medical college. They will have very good gynecologist and dietician who will be able to guide her adequately.