Université Libre de Bruxelles (ULB) has a long-standing tradition of excellence in Research and is recognized as one of the largest and most prestigious Research Universities in Belgium. The Research Laboratory on Human Reproduction is based at the Medicine Faculty, adjacent to the University HUB Hospital. HUB bring together 3 international renowned institutions pooling the respective expertise and competence to deliver excellent care and cutting-edge research. This dynamic hospital group includes Erasme Hospital – with its fertility clinic serving as a reference center for fertility preservation, Bordet Institute – an internationally renowned OECI-certified comprehensive cancer center, and HUDERF – the only Belgian hospital dedicated exclusively to children and adolescents. Such a collaborative and rich network provides an ideal environment for achieving the objectives of PredictAYA.