Inclusion criteria regarding the mother:  Person affiliated or beneficiary of a social security plan; Free, informed and written consent signed by the participant and the investigator (at the latest on the day of inclusion and before any examination required by the research); Woman who gave birth in one of the maternity hospitals participating in the study; Diagnosis of postpartum depression made by the perinatal psychiatry team according to the clinical criteria of the DSM-5; Time to onset of depressive symptoms within the first 12 months after childbirth; Treatment for postpartum depression that started at least 8 weeks ago with improved mood as assessed by the psychiatrist.  Inclusion criteria for the baby:  Baby aged less than 1 year at inclusion; Twins will be able to participate in the study and benefit from the interventions;  Non-inclusion criteria concerning the mother:  Uncontrolled substance use disorder; Presence of suicidal ideas at inclusion; Manic episode of a bipolar disease Psychiatric pathology decompensated upon inclusion and corresponding to the following list: Schizophrenic disorder, Schizoaffective disorder, Mood disorders with psychotic symptoms; Non French speaker.  Non-inclusion criteria for the baby:  - Baby hospitalized or having sustained medical care upon inclusion in the context of a somatic pathology.