*****FROM ABC NEWS MEDICAL UNIT*****
Dear Krimjest thank you for your question.
Actually, researchers at UCSD reported results in 2006 from a preliminary study that indicated an association between autistic disorder and children who were NOT breastfed or were given supplemented infant formula. Here's a link to the abstract: http://www.ncbi.nlm.nih.gov/pubmed/16978397?ordinalpos=5&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum
Note: Top medical experts on autism answer questions like these on the ABC News OnCall+ Autism site: http://abcnews.com/autism .