Three boys diagnosed as suffering from autistic disorder were born in Sweden to mothers born in Uganda. Two were related but the third boy was unrelated to the others. The prevalence for autistic disorder in Göteborg children born to mothers who were born in Uganda was 15% which is almost 200 times higher than in the general population of children. The possible reason for the high autism rate in this particular ethnic subgroup is discussed. (Gillberg, C., Schaumann, H. & Gillberg, I. C. (1995). Autism in immigrants: Children born in Sweden to mothers born in Uganda. Journal Of Intellectual Disability Research: JIDR, 39(Pt. 2), 141-4.)
Somali and Ugandan autism rates skyrocket when children are born in Northern latitudes like Sweden and Minnesota. If light is having an impact, we would expect to see season of birth effects. Both the Vitamin D and testosterone/pineal theories, based upon light, should be revealing season of birth effects.
Another question would be, are mothers and fathers immigrating from equatorial regions to Northern climes having autistic children in larger numbers? What happens when couples with Indonesia immigrate to Scandinavia and Minnesota?
