title: [Principal trends in mental retardation research (review)].
mesh_terms: D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure; D002906:Chromosomes, Human, 6-12 and X; D004200:Diseases in Twins; D004314:Down Syndrome / Q000209:etiology / Q000235:genetics; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000150:complications; D008607:Intellectual Disability / Q000209:etiology / Q000235:genetics; D007713:Klinefelter Syndrome / Q000175:diagnosis; D008297:Male; D009030:Mosaicism; D010661:Phenylketonurias / Q000175:diagnosis / Q000235:genetics; D012106:Research; D013577:Syndrome; D009626:Terminology as Topic; D014314:Trisomy
vernacular_title: Osnovnye napravleniia v izuchenii oligofrenii (obzor).