Genetic disease--risks of occurrence and recurrence.
D002869:Chromosome Aberrations / Q000453:epidemiology; D025063:Chromosome Disorders; D000013:Congenital Abnormalities / Q000453:epidemiology; D030342:Genetic Diseases, Inborn / Q000453:epidemiology; D012008:Recurrence; D012306:Risk; D013019:South Africa