Objective To identify risk factors of early and late postpartum depression (PPD) among a wide range of variables including sociodemographic characteristics, childhood trauma, stressful life events during pregnancy, and history of personal and family psychiatric disorders; and to assess the contribution of each risk factor. Design Nested case-control in a prospective longitudinal cohort study. Setting Eight maternity departments in Paris metropolitan area, France. Sample 3310 women with deliveries between November 2011 and June 2016 Methods Cases were identified as women with early or late PPD. Controls were all cohort participants without either early or late PPD. Main Outcome Measures Early and late PPD are assessed respectively at 2 months and one year postpartum. Results: Stressful life events during pregnancy have a dose response relationship with both early and late PPD: each additional event increased the risk of PPD. In multivariable models, early PPD was independently

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The literature on the existing evidence for a genetic component is reviewed for substance use disorders (SUD), formerly known as substance abuse and substance dependence. The chapter provides a historical perspective of the evolution of genetic understanding in the field. It also discusses the most recent methods of studying genetic factors in SUD, as well as the related discoveries of genes involved in SUD. It concludes on the possible role of genetics in the evolution of the concept and the mechanisms of SUD.