Post-partum time is an eventful period with modifications of somatic but also biological and psychological status of women, leading to increased risk of anxious and depressive disorders. Diagnosis of post-partum blues (PPB) or post-partum depression (PPD) is sometimes difficult. PPB is usually benign; thus a punctual help is usually sufficient. A severe or long duration PPB is associated with an increased risk of PPD which has to be taken into account. PPD can be difficult to diagnose because of multiple clinical forms and specially variations in intensity. During prenatal period, the aim is to look for women who are at risk for PPB or PPD. So it is necessary that the different practitioners can exchange informations. A treatment of PPD is essential because it has an important impact on mother and child's health. General practitioner involves from prenatal period (deflection of risk factors) to the diagnosis, the look out and the following of mothers and children in collaboration with obstetric, pediatric and psychiatric teams.