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What do you think is causing the rise in the number of autism cases?

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Doomflower · 41-45, M
Better detection. People get diagnosed as adults now sometimes because in the past it wasn't recognized as high functioning autism, they were just "weird" kids.

Also I think the rise in women giving birth later in life has a lot to do with it. The prenatal environment influences gene expression so the causes probably vary.

Another factor is the gender divide in autism. There are far more autistic males than females. This makes sense given the added steps needed to make a male fetus.