Researchers have so far failed to link causation to effect (i.e. prenatal cocaine exposure studies - samples too small to be of any significance). Nevertheless, genetic predisposition generally points to the mother's habits. Henceforth, cognitive, motor, behavior, developmental, and language problems are predominantly linked to the first trimester. Analogously to a degree - hormones usage does affect the male DNA structural makeup -- read something to this effect a while back (albeit not linked to steroids per say.)
