All Sorts of Situations

We had talked about open adoption and we thought we could not agree right away to a totally open adoption. There's always a possiblity that it would work out if we all met and agreed on something a little more open, but it would have to be right. There is also the situation about drug use. We have sort of taken everything "as it comes". I would rather not think too far in advance and think of all the bad situations that could be presented. I did look up about Meth use and I think that's dangerous for the baby. But what about other drugs.....anyone know? I guess marjuana isn't something too serious if used moderately during pregnancy.....but I don't know. This is what I copied from a website:

Unless you smoke in excess of three grams a day (6-10 joints)
It is very unlikely you will damage your unborn baby.

is that true?? What other drugs and what do they do?? What about mental illness? Are mental illnesses genetic? I guess I shouldn't wait until these things come up but I sure hate looking up all these things....it's very depressing to think of all thie things that could be wrong.....we have put this in God's hands, but i guess it is important to be informed...........

Anyone know about all this or have a good website with all the info??