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.

THC should not be used during pregnancy.

The longer version: there is evidence of a pathway for THC to be harmful during pregnancy. Much more study is needed. In the meantime, since THC is not needed during pregnancy, the risks clearly outweigh the benefits and pregnant persons should avoid THC.

Further research needed to say anything of significance, unless you're especially concerned about your pregnant rat's marijuana habit.

Probably don't smoke a lot of weed during pregnancy? But I think that was already more or less a given.

possible "neuropsychiatric disorders linked to aberrant dopaminergic function."

I took this to mean: possible problems regulating/utilizing dopamine which could mean a whole lot of things. increasinly predisposed to things like depression, difficulty breaking addictions that supply the user with dopamine, etc.