smstonypoint
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I have often wondered if autism was at all related to illegal drug use, paticuarly marijuana. You dont know what chemicals the weed you buy has been treated with.
I know there are probably non drug users that have autistic kids. And drug users that have normal kids. Maybe the occurence with drug users is higher?
But i wonder if it is chemicals or something?
My impression is that the causes aren't understood. The CDC lists some possibilities.
We do not know all of the causes of ASD. However, we have learned that there are likely many causes for multiple types of ASD. There may be many different factors that make a child more likely to have an ASD, including environmental, biologic and genetic factors.
Most scientists agree that genes are one of the risk factors that can make a person more likely to develop ASD.
Children who have a sibling with ASD are at a higher risk of also having ASD.
ASD tends to occur more often in people who have certain genetic or chromosomal conditions, such as fragile X syndrome or tuberous sclerosis.
When taken during pregnancy, the prescription drugs valproic acid and thalidomide have been linked with a higher risk of ASD.
There is some evidence that the critical period for developing ASD occurs before, during, and immediately after birth.
Children born to older parents are at greater risk for having ASD.
CDC | Facts | Autism Spectrum Disorder (ASD) | NCBDDD
Speaking of marijuana, we do know that juvenile arrests for its possession have led to a decline in honey bee colonies. Or is it the other way around?

r = -0.93
Honey producing bee colonies (US) correlates with Juvenile arrests for possession of marijuana (US)
Steve
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