What is the most common genetic cause of mental retardation

There are many causes of mental retardation, including genetic and chromosomal disorders, infections during pregnancy, drug and alcohol use during pregnancy, problems with the birth or delivery, prematurity and low family iq in general.Most affected individuals have mild mental retardation (iq of 50 to 70).Mental retardation has been categorized into severe mental retardation where genetics plays a very important role and mild mental retardation, in which genetics in some instances plays a role but in which cultural factors also matter a great deal.Anything that disrupts the normal course of brain development before birth, during birth or in the childhood years can cause it.The effects are irreversible and last a lifetime.Click to see full answer similarly, it is asked, which of the following is the leading cause of mental retardation in babies?

What is the second most commonly recognized genetic cause of mental retardation?Mental retardation is caused by a number of different factors.Fragile x syndrome (fxs) is an inherited form of mental retardation.Down syndromefragile x syndrome klinefelter syndrome turner syndrome.