In humans, as well as in animals, aggression occurs more often in men. Frustration produces a readiness for aggression. When the source of the frustration cannot be challenged, the aggression gets displaced onto an innocent target with violent behaviour. Displacement behaviour is associated with reduced stress levels among men but not women. Displacement aggression also lowers the level of glucocorticoids in baboons. Recently, I've learned that when a rat’s mother is present near her child, she can replace the release of her infant’s glucocorticoids, and thereby blunt the stress response of her infant (who would otherwise secrete these stress hormones). I've searched the web to find out if this is true, but I couldn't find anything. Could anybody provide me with more information regarding this research? I'd like to know whether this is actual science or pseudoscience.