The 5‐HT1A receptor (5‐HT1AR) has been shown to be implicated in anxiety behavior and stress response44 and the monoamine oxidase A (MAO‐A), which degrade serotonin, has been shown to be increased in depression disorders and is regulated by the glucocorticoid receptor, which binds cortisol/corticosterone.21 This evidence concerns the gene MAOA and Anxiety.