PHILADELPHIA (WPVI) -- The Trump administration took to the podium Monday, stating the use of Tylenol or acetaminophen during pregnancy may increase the risk of autism .

The Food and Drug Administration will notify doctors immediately.

"They are strongly recommending women limit Tylenol use during pregnancy unless medically necessary," said President Donald Trump.

The FDA's notice states:

"To be clear, 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," and the association is an ongoing area of scientific debate.

Dr. David Mandell, a psychiatry professor at the University of Pennsylvania, said this research is challenging.

"You have to

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