[Pediatric neurology].
D000367:Age Factors; D000818:Animals; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004314:Down Syndrome / Q000150:complications; D005260:Female; D005600:Fragile X Syndrome / Q000150:complications; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology* / Q000235:genetics; D008661:Metabolism, Inborn Errors / Q000150:complications / Q000628:therapy; D009154:Mutation; D011247:Pregnancy