Well, I'm only just trying, but I'll post my so far experience anyway. I asked my doctor about a year ago if I'd ever be able to have kids. And at the time, she said she felt I had the potential to-but at the time, my PFTs were too low. (50s-60s) She reccomends them to be at least 70, and holding them for a while. So I started doing all these other thigns to improve-increasing my therapies, and the quality of them. I do alot of natural stuff too. I made appointments at several specialists to make sure I was healthy in other respects-had CAT scans, MRIs, bloodwork, Endoscopy, Colonoscopy, ect.
Anyway, after all that my PFTs are 75, and I've held them solid for 6 months. Thats 6 months without my typical antibiotcs (that would have to stop for pregnancy, we had to test it, to make sure I really could go 9 months without them) So she gave me the green light to start trying about 2 months ago. This is the 1st cycle we've actually tried though. I'm excited, nervous, alot of things.
There are several moms here with cf that can help you. They have awesome experience and advice.
Happy trying!!!!