Chromosomal Abnormalities in Idiopathic Mental Retardation Patients at a Charity Center in Hamadan, Iran
Background Chromosomal aberrations are one of the most common causes of mental retardation (MR).Objectives In this study, in order to identify the rate of chromosomal abnormalities in idiopathic MR, 50 MR patients at a charity center in Hamadan, Iran, were investigated.Methods Fifty mentally retarded male patients without specific chromosomal abnor