President Donald Trump and his top health officials on Monday declared, without presenting definitive scientific evidence to support the claim , that pregnant women who take acetaminophen increase the risk of their children developing autism spectrum disorder.

Research into a possible link between neurological conditions like autism and the use of acetaminophen, the active ingredient in Tylenol, during pregnancy have produced conflicting results. Some studies , including one published by BMC Environmental Health in August, have suggested a link, but others have not. MORE: 1 in 6 parents say they have skipped vaccines for their kids, survey shows

The Food and Drug Administration moved to update labels on acetaminophen products so they note evidence suggests that

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