Hello, I have gone through your query and understood the concern. Weight gain is a consequence of the hormone imbalance in PCOD and in turn, aggravates the condition by increasing the body need for hormones. Exercise, relief from stress and dietary modifications in addition to medication are most often helpful in regulating weight. Exercises like skipping, swimming and aerobics are advisable. Metformin is good to manage insulin resistance usually associated with PCOD. If your doctor suggested this for you, please continue. Hope you find this information useful. Take care.