People commonly experience depression after a traumatic event, such as leaving a stressful marriage and getting a divorce. However, there is a distinction between trauma-related depression and clinical depression, which can be hereditary. Depression caused by trauma can gradually subside, though it may take months or years. Clinical depression, also known as major depression, likely existed before your divorce and may grow worse if left untreated. Research suggests that people with clinical depression are more likely to have conflict in their marriages, which may lead to divorce.