Inclusion Criteria:  For the mother:  Mother over 18 years old, who gave birth to a healthy child Mother having a PTSD score higher than the threshold (PCL-5> 38), 5 +/- 1 week after delivery and the traumatic event is related to childbirth or pregnancy. Mother Speaking and reading French, Mother with signed consent Mother with rights open to social security Mother and Father consent to the participation of the baby  For the father:  holder of parental authority Speaking and reading French Consent to self-reported questionnaires  Exclusion Criteria  PTSD not related to pregnancy or birth.  Situations in which interaction with the infant may be affected either by a long separation related to a hospitalization or by impairment in the child's interactive skills  Childbirth under 37 weeks of gestational age Pathology of the baby requiring more than 1 week of hospitalization after birth Foetal pathology that can alter the baby's interactive development. Foetal pathology requiring a foreseeable baby's hospitalization in the first 3 months of life, longer than 3 days Twins Stillbirth