"Today, in a cabinet meeting, U.S. secretary of health and human services Robert F. Kennedy, Jr., claimed that there is a link between autism and circumcision. There's two studies that show children who are circumcised early have double the rate of autism. It's highly likely because they are given Tylenol, he stated, without citing the studies. Kennedy was probably referring to a 2013 study of eight countries and a 2015 study from Denmark, both of which claimed to show a link between circumcision and autism"
"Neither study shows a causal link between circumcisionor the pain relief medications that are often prescribed along with the procedureand higher rates of autism. In the decade-plus since each was published, autism researchers have heavily criticized these studies. And after reviewing both studies, scientists last year found no evidence supporting the claim that circumcision leads to autism or any other adverse psychological effects."
Two ecological studies from 2013 and 2015 reported correlations between circumcision rates and autism prevalence. Methodological flaws in those studies have been widely criticized by autism researchers, who found no basis for causal claims linking circumcision or associated pain-relief medications to autism. Systematic review and expert evaluation concluded there is no evidence that circumcision causes autism or other adverse psychological effects. Evidence that acetaminophen (Tylenol) given to babies, children, or taken during pregnancy increases autism risk is very limited. Cross-country comparisons and single-country analyses cannot establish causation without robust individual-level data and controls.
Read at www.scientificamerican.com
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