“…Autosomal recessive inheritance has been postulated for Werner's syndrome, Cock ayne's syndrome, ataxia telangiectasia, and Bloom's syndrome [Beauregard and Gilchrest, 1987;Martin, 1978], In contrast, pro geria and myotonic dystrophy have been proposed as autosomal dominant diseases [Badame, 1989;Beauregard and Gilchrest, 1987;Brown et al, 1985], Genetic analysis would benefit from the possible advantage of a single allele disorder on one chromosome. A complication with progeria is the inability to prove its mode of inheritance because as a general rule these patients do not reproduce [Badame, 1989;Beauregard and Gilchrest, 1987;Brown et al, 1985;DeBusk, 1972]. Remarkably a recent report has appeared describing fertility in a case of progeria; how ever, the subject exhibited a marked delay in the onset of classical symptoms [Corcoy et al, 1989], Premature ageing in Werner's syndrome has a delayed onset and the progression of the various ageing changes is variable [Ep stein et al, 1966], This infers that the disease is not a simple expression of a single gene defect.…”