Taking folic acid during the window around conception reduced the risk associated with pesticides, researchers examined many children who had been diagnosed with ASD, the researchers interviewed their mothers about their household pesticide exposure during pregnancy, folic acid and B vitamin intake.
Children whose mothers took 800 or more micrograms of folic acid and other prenatal vitamins had a lower risk of developing autism spectrum disorder ASD even when their mothers were exposed to household or agricultural pesticides.
Mothers who took less than 800 micrograms and encountered household pesticides had higher risk of having a child who developed an ASD than their counterparts who took 800 micrograms of folic acid or more and were not exposed to pesticides.
The risk increased for women exposed several times, women with low folic acid intake who were exposed to agricultural pesticides during a window from three months before conception to three months afterward were at higher risk. Folic acid can reduce the risk of developing autism but it can not prevent it completely. Avoiding chronic pesticide before and during pregnancy can prevents ASD.
Folate plays a critical role in DNA methylation- a process by which genes are turned off or on, as well as in DNA repair and synthesis. These are important during periods of rapid growth when there are lots of cells dividing in developing fetus. Taking folic acid can improve genomic functions.
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