Saw this article and wanted to briefly draw it to peoples attention. While legitimate research has yet to be done illustrating a link between other medical procedures (like vaccination) and autism, it would appear that prenatal deficiency in vitamin D does have a direct, correlated effect. In an article recently published in Molecular Psychiatry, the authors describe the correlation between vitamin D and birthing children who go on to show autistic symptoms. The study was performed with a very large sample size (>3000), consisting of multiple ethnicities.
The authors conclude:
Just as prenatal folate supplementation has reduced the incidence of spina bifida, we speculate that prenatal vitamin D supplementation may reduce the incidence of ASD.
An interesting tangential observation for this study is the previous observation between anti-depressant use in pregnant mothers and child autism symptoms (see: https://www.drugwatch.com/2016/01/13/antidepressants-during-pregnancy-and-autism-risk/), perhaps there is some relationship again to a vitamin D deficiency as depressed people are more likely to stay inside, away from the sun.
For a summary of the current article on Vitamin D deficiency and Autism see:
For the original research article see:
Note the conflict of interest statement here, “The authors declare no conflict of interest.” Lends additional credibility to the work.