Intellectual Developmental Disorder, X-Linked 14, also known as mental retardation, x-linked 14, is related to non-syndromic x-linked intellectual disability 14 and microcephaly. An important gene associated with Intellectual Developmental Disorder, X-Linked 14 is MRX14 (Mental Retardation, X-Linked 14). Related phenotypes are seizure and macroorchidism