Reporting in JAMA Psychiatry, the researchers found that autism spectrum disorder is 81 percent reliant on inherited genes, while environmental factors account for less than 20 percent of the risk. Maternal factors – such as the mother's weight, whether she has polycystic ovary syndrome, if the baby is born by caesarian section, etc. – were found to have a "nonexistent or minimal” impact on the development of ASD.I’m acquainted with a family in which ASD symptoms are displayed across three generations of afflicted-to-varying-degrees individuals. They present a veritable panoply of dysfunction.
Note to anti-vaxxers: The study adds about possible ASD causal factors, “once again, it is categorically not vaccines.”
