Lorelie: You are not losing anything. You know why?

Autism etiology is multifactorial! Shared factors. All you need to see is "How different factors can affect the human genome and what is the final result in its structure and functioning".
Genetic mutations are classified as 1) Mendelian inheritance 2) Acquired mutations.
If a fetus is exposed to eating toxic food item by his/her mother, then the damage is said to have occured in UTERO itself. The result is that the baby gets a DD thru acquired mutation. I hope this clarifies a bit for you.