This week, President Trump urged pregnant women to "tough it out" and take Tylenol sparingly on the basis that there's a link between the active ingredient in the pain killer, acetaminophen, and autism.

Medical experts have strongly pushed back on the guidance, arguing that such claims are misleading and research shows there's no causal link between acetaminophen and autism. The Food and Drug Administration also later clarified that "while an association between acetaminophen and autism has been described in many studies, a causal relationship has not been established and there are contrary studies in the scientific literature."

Still, the remarks on Monday sparked confusion, worry and guilt among pregnant women and families with children who have autism. Medical scholars

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