Hi I am new to this thread as I have been doing IUI uising puregon for 18 months now. I just have a few questions as my new FS has put me on metformin. What is it for? Other than regulating your insulin levels. Is it to help with weight loss, as I lost 11kg on reductil in just under 60 days in the last week i have lost 2kg more. What more does he want from me?