You usually shouldn't draw such conclusions from single studies. This was a rat model studying a specific gene and a drug therapy for it, it might be one datum among many if you were surveying the literature to try to draw conclusions about plain terms conclusions to extract.

A quote from the abstract "Emerging clinical evidence, however, indicates that prenatal cannabis exposure (PCE) predisposes offspring to various neuropsychiatric disorders linked to aberrant dopaminergic function." is about the best you can do. There is growing clinical evidence that cannabis exposure during gestation leads to problems with dopamine.