hmm.. I'd avoid both... dunno which would be worse! Would hate to think what a combination of both would do.

This is from the NIDA site:
Can marijuana use
during pregnancy harm the baby?

Research has shown that some babies born to women who used marijuana during their pregnancies display altered responses to visual stimuli, increased tremulousness, and a high-pitched cry, which may indicate problems with neurological development. During the preschool years, marijuana-exposed children have been observed to perform tasks involving sustained attention and memory more poorly than nonexposed children do. In the school years, these children are more likely to exhibit deficits in problem-solving skills, memory, and the ability to remain attentive.
And as for Fetal Alcohol Syndrome... that's scary stuff.. I've never really looked up what it was before... but on a quick search...eeek. They can have characteristic facial features and everything!