There are over 250 recognized sex-linked diseases, affecting every organ system. Of these, 95% affect males, (Emery, 1968). Despite these many sex-linked diseases, at present prenatal diagnosis can specifically be made in fewer than 40 diseases. (Emery, 1968). These sex-linked diseases are individual rare and some are named after physicians who described them, for example, Hemophilia A and B, Duchenne muscular dystrophy, fragile-X syndrome, Fabry disease, Hunter syndrome, Lesch-Nyhan syndrome, and Menkes steely-hair syndrome. The following discourse considers the reasons …showed first 75 words of 2109 total…

…showed last 75 words of 2109 total…and these girls have only a 5 percent risk of being intellectually impaired.         Further research inth this devistating disorder and it's complex heridaty pattern may significantly reduce the amount of congenital mental retardation.         Heredity, biochemical and other disfiguring birth defects must be a top priority with expectant parents. A knowledge of these concerns will alolow them to make wise decisions regarding prenatal diagnosis and decisions and availability of treatment to prevent birth defects, thereby saving lives.