Brief report: are autistic-behaviors in children related to prenatal vitamin use and maternal whole blood folate concentrations?

Researchers asked 125 moms about vitamin use during pregnancy. They also drew blood to check folate levels at delivery.

Kids took the Social Responsiveness Scale at . Higher scores mean more autistic-like behaviors.

Moms who took prenatal vitamins most days in the second trimester had kids with 74 % lower odds of high SRS scores.

Surprise: the actual folate level in mom's blood showed no link to child scores. The pill habit mattered more than the lab value.

Pu et al. (2013) found the MTHFR C677T gene raises autism risk 1.4-fold, especially where food lacks folic acid. Whitehouse et al. (2014) now show the vitamin itself can cut risk even in non-fortified areas.

Ezedinma et al. (2025) linked that same gene to a unique 4.5-Hz brainwave pattern. Together the three papers trace a path: gene variant → low folate use → more autistic traits → measurable EEG signature.

Huang et al. (2025) warn that high SRS scores in typical kids can mimic ASD biology. So the 74 % reduction seen here may reflect true prevention, not just score shifting.

You can't change genes, but you can ask about vitamin habits. Add two quick questions to your intake: 'How often did you take prenatal vitamins in months 4-6?' If the answer is 'rarely,' note it as a modifiable risk factor and loop in the pediatrician for nutrition guidance.