It's a homozygous recessive disorder. If two carriers reproduce, there is a 25 percent chance the child has CF. If a woman with CF has children with a carrier,

It's a homozygous recessive disorder. If two carriers reproduce, there is a 25 percent chance the child has CF. If a woman with CF has children with a carrier, there is a 50 percent chance the child has CF and a 50 percent chance the child is a carrier. Ninety-five percent of men with CF lack a vas deferens, leaving them effectively sterile. The medical community is understandably reluctant to assist two people with CF in reproducing together as their child is guaranteed to have CF. If you are at risk of having a child with CF and know it, a best practice is to try to not conceive a child with CF. I doubt taking a drug during pregnancy would prevent a male child from being born without a vas deferens and see no reason to care. Just try to not have a baby with CF. It's called a Dread Disease for a reason.