Interpretation
In order to better understand PPD and to develop targeted prevention
practices, several studies have attempted to define subtypes of PPD
according to the time of onset, severity or predominant symptoms (5–8).
In this study, we chose to distinguish PPD according to the onset of
symptoms. Early and late PPD share some common pre-disposing factors:
namely a personal history of depressive disorder and stressful life
events during pregnancy. However, the two trajectories can also be
distinguished: by socio-economic correlates, life events, and associated
psychiatric disorders.