Just to pitch in my two cents: I'm not IR and started with a relatively normal BMI of 21 and I started Met in early/ mid Feb this year ramping up from 500mg to 1500mg/ day over a few weeks. (Nausea took a while to get used to but I dropped a bit of weight, now BMI's 19.7-20) Cycle in Feb was normal and judging from temps, I may have O'd. It didn't really affect me otherwise.
RE then started me on clomid in mid March, and while O hasn't been confirmed yet (going to clinic this Fri to find out), my largest follicle was 24 on Monday and I saw the EWCM plus higher temperatures over the last two days. Will find out on Friday with temping, u/s and bloodwork and that'll start my 2ww hopefully.
wmoody: You might already have read this, but met does take a few months to kick in (like 3-4mths) coz it takes your body some time to acclimatize. It also aparently helps CC-resistant people so if you've been on clomid but didn't respond, it might help in tadem. (One reference cited quite a few times on this forum is:
http://www.ncbi.nlm.nih.gov/pubmed/1...?log$=activity) Good luck and baby dust!!!