6. Prevalence of autism is higher among boys than girls
Next on our list of autism facts and statistics: autism rates in Amish, countries that don’t vaccinate and more is that boys are four times more likely to be diagnosed with autism than girls. According to researchers one of the possible reasons for this claiming is the mutation on the PTCHD1 gene. If a boy’s X chromosome is missing this gene or some of the other nearby DNA sequences, he is at high risk of developing ASD. Girls are protected by nature since they carry a second X chromosome which in a way shields them from ASD.
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