Crunchy Moms' Have Stayed Away from Tylenol for Years WSJ The headline Tylenol causes autism has sparked concern. But the science tells a more nuanced story. Some observational studies have found that when pregnant women used more acetaminophen, their Mark Hyman, No link between acetaminophen use during pregnancy and children's autism risk The Dangers of Acetaminophen for Neurodevelopment Outweigh Scant Evidence for Long Term Benefits