Inclusion Criteria:  Eligible women will be >18 years of age, understand and speak English (so that they can participate in the CBT group and complete study measures), have an EPDS score between of 10 or more and meet diagnostic criteria for current major depressive disorder on the Mini International Neuropsychiatric Interview-Plus (MINI-Plus). They will also all be within 12 months of delivering an infant.  Exclusion Criteria:  In order to increase the relevance and generalizability of our findings, women can have psychiatric comorbidities with the exception of bipolar disorder, a current psychotic, substance or alcohol use disorder, or antisocial or borderline personality disorder. These are predictors of significant difficulty participating in therapy groups and/or non-response to CBT.