Lots of research has been done to find out what exactly causes autism. It is worthwhile to take a look at some of them to have a better understanding of their relationship.
One of the most controversial causes is that the vaccine causes autism. The relationship between the vaccine and autism has been rumbling around for decades. There are researches that prove a correlation but at the same there, there are some that prove there is none. According to a research done in Denmark on a sample size of 657,461 children, it shows that there is no increase in risk associated with the vaccination, even for children who already have an increased risk of autism.
Some data may help you have a clearer understanding of the relationship between genetics and autism. Up to 95% of identical twins have autism and 31% in non-identical twins. As identical twins share 100 percent of their genes, it seems that there is some correlation. However, it is also unfair to say that genes cause autism as autism was not present in the sibling of the identical twins in all cases when one has been diagnosed with Autism.
MRI scans had been done in an attempt to review the relationship between brain structure and autism. Many articles have found that children with autism have a larger brain size. The increased brain size was attributed to an increase in both the gray and white matter volumes. The left and right symmetry are different from those of normal developing children. Lastly, the corpus callosum, the fiber bundle that connects the left and right sides of the brain, was abnormally shaped and thicker in the deletion carriers but thinner in the duplication carriers, compared to the control group and familial non-carriers.
Fragile X Syndrome
Fragile X Syndrome is a genetic disorder characterized by mild-to-moderate intellectual disability. About one in three people with the syndrome also have autism.
Research on the link has been happening for over 3 decades. The analysis revealed that children born to men aged 35 to 60 are up to 24 percent more likely to have autism than children with fathers aged 31 to 34. Likewise, children born to women aged 32 to 46 are up to 34 percent more likely to have autism than those born to women who are 29 to 31.
In conclusion, we are unable to pinpoint the cause of autism. There seems to be some correlation between the points above but never causal.
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