I have stayed on 1000 MG metformin for 5 years .It helped me get preggo when combined with low carb /exercise .I got preggo after a year on it .I stayed on it because I know it helps .Anyone with insulin resistance should try metformin. I also would sometimes get my period without using any progesterone but I've needed it since having my daughter .Anyone trying to get preggo should stay on this as well .