Is your doctor doing monthly ultrasound checks (with the ovulation kits, during the diagnosis period, not the actual trying to conceive time) to see how mature your eggs are getting? I actually did have a problem with my eggs fully maturing that was diagnosed in the usually testing to see what the infertility issue(s) was (were).
I did Clomid first for a couple of rounds, and then a few round of shots (2 different kinds, the last cycle with an additional shot...I can't remember the names at the moment...).
My gyn/infertility doctor didn't mention it being more common in CF patients though, only the cervical mucus issue (which I also have), and he has seen many CF patients over the years.