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 for the
impor…
