So, we would expect ASD diagnosis to be dropping, because while lead is a lot more prevalent than say the 1920s, it’s significantly less prevalent than the 1970s as shown by blood toxicity trends.
… oh look, that doesn’t appear to be the case. Could it be that you’re wrong? Cause last I checked the most likely predictor of ASD is if your relatives have it, implying a strong genetic component, and not lead exposure (in-vitro or otherwise).
So, we would expect ASD diagnosis to be dropping, because while lead is a lot more prevalent than say the 1920s, it’s significantly less prevalent than the 1970s as shown by blood toxicity trends.
https://ourworldindata.org/data-insights/lead-exposure-has-fallen-dramatically-in-the-united-states-since-the-1970s
… oh look, that doesn’t appear to be the case. Could it be that you’re wrong? Cause last I checked the most likely predictor of ASD is if your relatives have it, implying a strong genetic component, and not lead exposure (in-vitro or otherwise).