For the record, I don't see anything wrong with the OP wanting to have a healthy baby. Maybe you think it's selfish, but I don't see it that way. Wouldn't you want your child to be as healthy as possible? Saying that she wants a baby doll that never gets sick is just rude and insulting. Everyone gets sick, and I think the OP knows that... Yes, the child could develop any other type of illness, but if you KNOW that they're going to have CF, you can at least make a choice when it comes to that. And I don't see where comparing CF to getting hit by a car really counts. CF is pedetermined by genetic mutation, and it's something you continuously have to live with... Getting hit by a car or being murdered isn't.
To the OP: As young as I am, I can understand to a degree what you feel. I've sworn off children for the very possibility that they could be born with my disease, and I would not want to subject that child to such a disease. I've been through enough torment (both physical and mental) to know that I would never want to subject someone I love to such a terrible thing if I can help it. I've seen the hardships my family has gone through for me, especially my mom having to battle drug companies and insurance to get me what I need. But on the other hand, having a child with CF could be a blessing in disguise. Yes, this disease is a curse, but because of that, I think a lot of us have learned to appreciate life a little more and have become stronger people because of it. Also, like someone else said, even if your child is born with CF, their case may not be as severe as others. It is ultimately your decision, though. If you don't want to take the risk, then don't have the baby. But as Emily said, the chance of producing a CF child is moderate, so if you keep trying for a healthy baby, you may have to repeat this process over and over until you get lucky. Do you really want to go through that again?