As many have mentioned, there are risks with biological children on other issues.
We ended up adopting a child that we have no maternal history on. All we knew is that based on the referral information and visit one, he was at or above target in development. Upon arriving home, we had blood work done. He tested positive for Hep A antibodies and nothing else. They said after further testing it could've been from a shot or an old infection that had cleared (probably not uncommon in an orphanage). While we can't rule out FAE, we've been home almost 15 months and our son knows most of his colors and shapes and well over half of his capital letters at 27 months so I'm not worried. I would do it again in a heart beat if we had the money.
I've also dealt with an FAS child for most of the last 19 years. My ex's daughter has done far better than anyone could've hoped based on her early years. She really has turned into a great young lady. She is making me a grandmother (around my 38th birthday no less!!
) to a baby boy. FAS/FAE are tough. There is no doubt about it, but in a lot of cases, it's not as bad as many expect (then again, I'm sure there are cases where it's probably worse than expected...it's all in degrees of abuse I guess).
Anyway, best of luck. IMO, I wouldn't worry about it too much. You would be led to the child that's meant to be yours.