This updated fourth edition offers information about the prevalence, symptoms, and types of depressive mood disorders, including major depression, dysthymia, atypical depression, bipolar disorder, depression during and after pregnancy, depression with psychosis, and seasonal affective disorder. It discusses genetic, biological, and environmental risk factors for depression and examines the impact of depression among the chronically ill, minority populations, children, adolescents, college students, men, women, and older adults. Information about depression's diagnosis and treatment- including therapies, medications, and brain stimulation techniques-is provided, along with facts about alternative and complementary therapies used to improve depression symptoms. Strategies for managing depression are also discussed, along with information about the warning signs and prevalence of suicide. The book concludes with a glossary of related terms and a directory of resources for additional help.