I am 21 and have CF. If when it's time for me to have children my significant other and I will adopt if they are a carrier. I couldn't bare the possibility of putting the burden of this disease onto another person. Yes, some of us are lucky and very healthy but some of us are not. If I were to have a child with CF, I'd be heart broken, and have to put them up for adoption, because I would not want to infect them with anything and trade things back and forth, unless I knew early enough for abortion, then I'd have to do that.
To be quite honest, CF has molded me into the person I am today, but I'm not always proud of who that person is. I'm apathetic, hopeless, and depressed a large portion of the time. Up until two years ago, I could barely communicate with other people in person because of how the other kids ridiculed me based on my disease as a child. You have to take the emotional and psychological ramifications into consideration as well as the physical.
I'm sorry for being so blunt about this, but I feel very strongly on the matter.