http://medicalxpress.com/news/2013-05-bigger-birth-weight-babie
The study found that bigger babies who were born weighing over 4.5kg (or 9lb
14) showed a higher incidence of autism, as did smaller infants who were
born weighing less than 2.5kg (5.5lb).
A baby who had poor fetal growth would therefore have a 63% greater risk of
developing autism compared to normally grown babies.
A baby who was large at birth would have a 60% greater risk. This effect was
independent of whether or not the baby was born pre or post term.
