Background: Congenital hypothyroidism (CH) is one of the preventable causes of intellectual disability. The aim of this study was to compare intelligence quotient (IQ) in early treated children with CH and healthy children. Materials and Methods: This cohort study was conducted on 78 early tre...

Background Mental retardation is a developmental disability that first appears at children under the age of 18. About 5% of the mentally retarded population is affected by severe mental retardation. Approximately 20% of the population with mental deficience presents moderate mental retardation and about 75% have mild mental retardation. A very important factor that cause mental retardation of c...

Introduction: Intellectual disability or intellectual retardation is a condition in which total mental functioning is distinctively below average and there are disabilities in adaptive behaviors during growth. According to the definition of American Mental Disability Community in 1992 a person is considered intellectually disabled if he or she has an IQ (intelligence quotient) of less than 70...

this is a discriptive study with the main goal to identify personal, pregnancy and delivery characteristics of mothers given birth to mentally retarded child. this study has been conducted in the rehabilitation center in tehran in 1994. a total of 150 women took part in this research, and the tool of was a check list which was completed by researcher through interview. the findings were illustr...

materials and methods a number of 100 patients with imr, normal karyotypes and negative fragile-x and metabolic tests were screened for subtelomeric abnormalities using mlpa technique. results nine of 100 patients showed subtelomeric abnormalities with at least one of the two mlpa kits. deletion in a single region was found in 3 patients, and in two different subtelomeric regions in 1 patient. ...