Treenie, did she do a hysteroscopy during the lap? It's so tricky when you're dealing with the "unexplained" diagnosis. For us, it meant "insufficiently investigated" because our first FS wouldn't do a lap to check for endo. Ever since we started testing further, we find problem after problem, so we went from "unexplained" to overwhelmed... But some couples are genuinely unexplained - whatever is getting in the way is beyond modern medicine or could boil down to really bad luck. If you have any doubts about the thoroughness of your FS, then it sounds like a second opinion would be a good idea.