Cystic fibrosis (CF) is the most common genetic disease among Caucasia
ns. Duchenne muscular dystrophy (DMD) is one of the most common X-link
ed genetic disorders, The CF and DMD genes were discovered a few years
ago, which provided the possibility for prenatal diagnosis and preimp
lantation diagnosis of CF and DMD by using specific DNA analysis, In t
his article, CF, DMD, the process of the identification of the genes o
f CF and DMD and preimplantation genetic diagnosis are briefly describ
ed.