Schizophrenia and autism probably share a common origin. An extensive literature study by a developmental psychologist demonstrated that both mental disorders have similar physical abnormalities which are formed during the first month of pregnancy.
The Netherlands Organisation for Scientific Research (NWO) (2008, November 24). Autism and schizophrenia share common origin. Retrieved January 12, 2009, from http://www.nwo.nl/nwohome.nsf/pages/NWOA_7LPL4Q_Eng