Is there a link between maternal folic acid deficiency and autism?

The association between maternal folic acid supplementation around the time of conception and a reduced risk of neural tube defects such as spina bifida is well established, but could folic acid deficiency affect brain development in other ways? New research from Norway seems to suggest so, reporting that maternal folic acid intake may have an inverse association with autism spectrum disorders (ASDs) including autistic disorder, Asperger syndrome, and pervasive developmental disorder not otherwise specified (PDD-NOS).

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