There are a couple of steps that a carrier couple could take in that situation: * IVF-PGD (like the couple in the article): http://en.wikipedia.org/wiki/Preimp

There are a couple of steps that a carrier couple could take in that situation: * IVF-PGD (like the couple in the article): http://en.wikipedia.org/wiki/Preimplantation_genetic_diagnosis http://en.wikipedia.org/wiki/Preimplantation_genetic_diagnos... * Use a donor egg or sperm * Adoption * For certain diseases like phenylketonuria, which are not life-threatening if certain dietary restrictions are followed, the pregnancy can proceed as normal but the baby can't be fed anything with phenylalanine in it.