There is no "blame the mother" involved. What were once commonly called "birth defects" - physical, mental and behavioral - have been around forever, and we still don't know the cause of all of them.
Some might recall that the old March of Dimes annual fundraisers at first were to fight polio. After polio vaccines practially eliminated that in the developed world, the March of Dimes continued raising money, but to fight birth defects once polio was under control.
Whether some common birth defects, or other problems are genetic, or developmental is still not known.
It is not directed at you, just the last post mentioning gestational disturbances i.e., something the mother did. It may not be intentional but the number of posts mentioning that without any mention of the many other causes of defects implies, mother (woman) did something bad. Yes, I am a bit sensitive after many years on FR. Just trying to ensure other causes get mention.