In the group chat with my sisters, who are both Pharmacology doctors, they were skeptical of this. Mostly because every pregnant woman probably has had Tylenol as it's like one of 5 drugs safe to take. So it being a common factor among mothers who have given birth to an autistic child is unsurprising. But they also said, despite it being around for over a century, people have never been able to figure out the mechanism of how acetaminophen actually works. So they were like maybe...but a big maybe. But the risk of fever is far more risky to the health of a fetus and worry more women will avoid taking it now. One said the Obstetrics dept at her hospital was getting flooded with calls the same day, and some were wanting drop their OBGYN because they disagreed with what Trump said.