RecruitingBehavioural interventionAnnouncement of Rare Metabolic Diseases in Systematic Newborn Screening: the Phenylketonuria Experience.The aims of this collaborative, interdisciplinary research project are to understand and describe the psychological impact of the announcement of a rare, serious disease present since birth and detected in the context of the systematic neonatal screening (DNS), in terms of the parents' experience, but also on the part of the medical team, in order to improve its process and the support it provides for the announcement of the diagnosis.