Let’s hold off on the blame the mother going on here.
Not all defects are simply the problem of gestation. Some happen inherently at conception, or even from faulty sperm. It is not always our fault.
Just trying to clarify that before too many more posts come out like these.
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.