A September 2020 meta-analysis concludes there is a significant relationship between autism and concentrations of lead and mercury in the body - read it here:
https://www.dovepress.com/the-relationship-between-the-level-of-copper-lead-mercury-and-autism-d-peer-reviewed-fulltext-article-PHMT and book your appointment to get tested for heavy metals, minerals and vitamins here. This is especially important when deciding on vaccination programs etc. - to know your heavy metal load beforehand.