Unusual brain chemistry

Endogenous cannabinoids linked to fetal brain damage imposed by maternal cannabis use

From the article:

A critical step in brain development is governed by endogenous cannabinoids, ‘the brain’s own marijuana’. ..... these endogenous molecules regulate how certain nerve cells recognize each other and form connections.

But this is not good news for babies with mothers that smoke:

Earlier studies have already found that children of marijuana-smoking mothers more frequently suffer from permanent cognitive deficits, concentration disorders, hyperactivity, and impaired social interactions than non-exposed children of the same age and social background.