I have a 12 year old stepson that has autism. My husband believe this to be a result of his mother drinking and doing drugs throughout her pregnany. He said she would drink hard liquor and she would get drunk and would smoke pot.   My husband feared for the baby when she was doing this but she would not stop. When my stepson was born his mother would just leave him in his crib. She would not take him out and work with him. My question is will my child have autism? My husband and I really want to have a child my biggest fear is having another autistic child. My stepson is very high functioning the only problem he really has is with his speech. He was diagnosed as having aspergers many years ago. There does not seem to be any cases of this on either his mothers side or his fathers side. His mother is not even in his life because she was not responsible enough to carry a child nor raise him.
I know that all parents take risks when trying to have a child. It really is a genetic lotto. Do you have any insight that may comfort me somewhat and not stress me out if we do get pregnant? Is there really anything we can do to make sure our child is healthy besides eating healthy, sleeping and getting a moderate amount of exercise?

Please help I am so lost and very very sad.