This report was produced as part of the ERC Starting Grant project "MobileKids : Children in multi-local, post-separation families". It analyses the responses of 1474 young people aged 12 to 18 who attended school in the Wallonia-Brussels Federation and who participated in the LAdS survey. The objective here is first and foremost descriptive: from the young people's own perspective, it is a question of mapping and describing post-divorce or separation family configurations, and highlighting certain key points of attention that shed light on the evolution of contemporary families. This report is made up of 5 parts: 1. Share of divorced or separated families and presentation of physical custody configurations 2. Evolving family norms and practices 3. Focus on shared physical custody 4. Focus on female single-parent households 5. Focus on father sole custody