Kathy Dettwyler gave a statistic on bf autism in her lecture at UALR here.
Brief, but she probably knows more. Check the archives?
Joy
<<Does anyone have any information or articles in regards to
breastfeeding and autistic children. I have one article:
Tanoue,Y. & Oda, S. (1989). Weaning time of children with infantile
autism. Journal of Autism and developmental Disorders, 19(3) 425-434.>>