Enogenous depression is a mood disorder that some people are born with. It's believed it is genetic - either inherited, or 'given' as genetic disposition. A sufferer, although is prone to get depressed on occasions of traumatic events, exhaustion or high stress may not be aware of the disorder until confronted by the notable and impairing symptoms of depression for the 1st time. Depressive episode can occur at any age, or despite the predisposition may never become a serious problem. The severity of depressions for this diagnosis vary greatly (from mild to severe).