Most with mental disabilities are born that way. As for the cause, you will have to ask them, there are many.
As in mentally retarded, yes, only something with a brain can be mentally retarded. The GROWTH of plants can be retarded, which means they are not growing as fast as they should.
About 10% of the mentally retarded population is considered moderately retarded.
Approximately 85% of the mentally retarded population is in the mildly retarded category.
Only 1-2% of the mentally retarded population is classified as profoundly retarded.
Josh Perry (Ponce), the actor who portrays the Retarded Policeman on YouTube, has Down Syndrome.
"Retarded" in English is attardé in French.
No,but frminism's progress has been retarded by close-minded persons.
About 3-4% of the mentally retarded population is severely retarded.
Mormons are not retarded. Just because they may have different views than you or do a lot of things differently than you, doesn't make them retarded.
Of Mice and Men has a mentally retarded character.
Yes, 2 to 3 percent of the population is mentally retarded.