Would IVF work for a man with cystic fibrosis?

my husband is infertile due to cystic fibrosis. I've been knowing this since we first started dating, but its really starting to hit home now because now we're at the point where we are ready to have kids & arent able to. Well I've done some research & the science behind it is that the tubes that carry sperm are being blocked by mucus & therefore the sperm isnt developing properly. The doctors say there's a 99.9% chance that my husband will never be able to have kids. If his sperms arent even able to fully develope would ivf even work for him?