To try and answer your questions: I noticed that I LOST about 15 pounds while I was taking Metformin. There is no cure for that Syndrome (as far as I've been told). I was diagnosed about 2 or 3 years ago with it. I'm told that people with this Syndrome can go on and have perfectly healthy pregnancies. I disagree unfortunetly. Although it does depend on your side effect cause by this syndrome. I don't ovulate (therefore obviously can't get pregnant). Not everybody is like that though. If you're still having regular periods I wouldn't worry about infertility.
My heart went out to you when I read your post and I wanted to reply! I, too, have PCOS, would love to lose weight, and have been on Glumetza. I think you can lose some on Glumetza, but if you have a lot to lose don't count on just that. The other thing you asked about was fertility. Well, l have 3 children! My third was all due to Metformin. I took it regularly, my periods really regulated themselves, and was pregnant within a couple of months. So, stay on track and good luck!
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