Research
There are some who believe that regressive autism is simply early-onset autism that was recognized at a later date. Researchers have conducted studies to determine whether regressive autism is a distinct subset of autism spectrum disorders. Over the years, the results of these studies have contradicted one another. Some researchers believe there is still nothing to support a definitive biological difference between early-onset and regressive autism. However, emerging research shows that males with regressive autism have brains that are six percent larger than anyone with early-onset autism. The brains of females with regressive autism show no difference in brain size.
Read more about this topic: Regressive Autism
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