thirdtimelucky, I think the main reason they use clomid is to "make sure" (ha ha, considering some patients don't respond to it at all) the patient O's within a reasonable timeframe - so I suspect it's just a timing thing. Our first FET I was offered clomid because we were doing it in December and would have to cancel if I O'd too late. I turned it down because I had awful s/e with it and was fortunate to O in time for the FET to go ahead (just barely). I don't know of any other benefit, but that doesn't mean there aren't any. If you ask your Dr about it, I'd be interested to hear what is said! Just one thing - you will want to make sure you get a lining check before transfer to make sure the clomid hasn't thinned your lining, as that's one of its s/e (usually only after a few cycles in a row of using it, but worth checking in case you're one of the "lucky" ones that thins more quickly).