I have PCOS and am on metformin, because my PCOS responds to it (so it is probably caused by insulin resistance). What it has done for me is give me a period and some semblance of a normal cycle. Before metformin, my cycles could be anything from 5 months to 2 weeks, and I was likely anovulatory.  Now I am at least ovulating.Â
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But although I ovulate, we seem to be having a difficult time with implantation. My first pregnancy didn't implant because I had very low progesterone levels, so I just did my first cycle of Chlomid with IUI and added Prometrium, and got the negative test a few hours ago. We're going to now look into LPD, so hopefully that will be some light at the end of the tunnel, though I don't know how you fix LPD besides adding progesterone....