Familial mental retardation.
D000293:Adolescent; D000328:Adult; D000368:Aged; D014695:Cerebral Ventriculography; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D004777:Environment; D005260:Female; D005581:Foster Home Care; D005799:Genes, Dominant; D006801:Humans; D007086:Illegitimacy; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D010375:Pedigree