Does fathers drug abuse effect unborn baby?

I have a friend that recently impregnated his girlfriend. I am worried because my friend takes a lot of pain killers, smokes a large amounts of pot, and a little ecstasy and drinks very much. I am pretty sure he has smoke some crack recently as well. His girlfriend took ecstasy too one time about a month ago, but rarely does any drugs. I wanted to know if the fathers drug abuse will have any effect on the baby? They just found out she was pregnant a few days ago.

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