Just for the sake of argument, when they do the standard test for carrying a CF gene, it is only about 70% accurate. My husband and I had the option offered to us numerous times, but decided not to test for the gene. We decided that our fertility was in God's hands and that if we did conceive, that child was meant to be. Also, for the sake of argument, just because you rule out the possibility of CF doesn't mean that you're going to get a perfect, healthy baby. Just something to think about. If you want a child, do you only want a child you know is going to be healthy? Then maybe you should rethink. Perhaps adopting, so you can see what you're getting into upfront is better for you. Second, every pregnancy is different, even for women without any health issues. No two are alike. You can make an educated gues based on certain health factors of how well you will tolderate it, but again, even healthy women go into a pregnancy no knowing exactly how their body will tolerate it. I know many women who have 5 children or more and they will tell you that each one's pregnancy and birth was unique. The best chance you can give yourself is to be as fit and healthy initially as possible and to keep it up throughout. It took my husband and I one year to conceive our daughter and we've been trying for the last 1 1/2 (since my cycles returned) to conceive again. I don't know if it is my CF that is preventing conception or if it is that I am still breastfeeding. Please don't think I am being harsh. I realize that that first paragraph can look rough of me. I guess I'm just trying to be honest. Please take it for what it's worth.