This is an incredibly difficult decision. I think, ultimately, it is completely between you, your spouse, and God. Would I prevent having my son if someone told me he'd have cf? Never. He has had a very full life and gives us so much joy. My husband and I are not prepared to make this decision just yet. Although it would be ideal to have IVF if we have another child, we cannot necessarily afford the procedure...and there are no guarantees with this either (no cf of course...but there can always be other complications). I really do see both sides. I believe there are situations when either decision is completely justified and right. Good luck to everyone.