President Donald Trump's Tylenol and vaccine warnings have left some pregnant women angry and others with questions.

During a White House news conference on Monday, Trump repeatedly warned pregnant women not to take Tylenol because of the risk of autism in their children.

The Associated Press spoke with Alison Singer, Co-founder of the Autism Science Foundation, to fact check some claims that President Trump has made during the conference.

“There was no data presented, there were no scientific study, no new scientific studies. Nothing new has been published in the literature," said Singer. "Instead, President Trump talked about what he thinks and what he feels without offering any scientific evidence. He said things like, you know, tough it out…”

Trump also fueled debunked claims that ingredients in vaccines or timing shots close together could contribute to rising rates of autism.

“We have done dozens and dozens of studies looking at vaccines as the potential cause of autism. We've looked at MMR to see if children who received MMR vaccine had a higher rate of autism. There was no relationship," added Singer.

The American College of Obstetricians and Gynecologists has long considered Tylenol, also known by the generic name acetaminophen, one of the only safe pain relievers during pregnancy.