President Trump said pregnant women should limit Tylenol use because it could increase the risk of autism in babies. “They are strongly recommending that women limit Tylenol use during pregnancy unless medically necessary,” President Trump said during the press conference. Is Tylenol safe for pregnant women to take? She also stresses that leaving a high fever, which acetaminophen can treat, unchecked in pregnant women can be dangerous. But so far, data overwhelmingly show that Tylenol does not cause autism in babies when taken by pregnant women.