Status and prospects of genetic disease.

The current status of our knowledge of genetic diseases is reviewed. The incidence of monogenic, multifactorial and chromosomal disorders, according to the literature to date, is given, and the possibilities of mass screening programmes are discussed. The prospects for antenatal diagnosis of genetic diseases are reviewed, with emphasis on the indications for amniocentesis and the safety of the procedure. Finally, speculations are made regarding the possible effects of medical and social practices on the frequency of genetic disorders in future generations.