Season of Birth Variations in the Temperament and Character Inventory of Personality in a General Population

Since several studies show season of birth variations in morbidity, suicidal behaviour & CSF monoamine metabolites, we investigated season of birth variations in personality in the population. We discussed the associations in literature between personality & the monoamines serotonin & dopamine, & suggest that our results are compatible with a hypothesis of season of birth variation in the monoamine turnover. The personality traits are likely to be influenced by several genetic & environmental factors, one of them being season of birth. (56 refs.)