title: [MENTAL RETARDATION FROM THE STANDPOINT OF CHROMOSOME STUDIES].
mesh_terms: D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D012734:Disorders of Sex Development; D004314:Down Syndrome; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008607:Intellectual Disability; D007713:Klinefelter Syndrome; D012728:Sex Chromatin; D014314:Trisomy
keywords: CHROMOSOME ABNORMALITIES; INFANT, NEWBORN; KLINEFELTER'S SYNDROME; MENTAL RETARDATION; MONGOLISM; SEX CHROMATIN; SEX DIFFERENTIATION DISORDERS; TRISOMY