The goal of this study is to evaluate in a prospective multicentre setting, to what extent this retrospectively defined AGO-score has predictive validity. The criterion aimed at is therefore the rate of complete tumor resections if the three score characteristics are present in invasive epithelial platinum-sensitive ovarian-, fallopian tube- or primary peritoneal cancer. This study will be the second in a series of three: (1) hypothesis building for a potential predictive score for resectability, (2) prospective confirmation of the AGO-score, and (3) application of the AGO-score as inclusion criteria for eligible patients in whom a formal comparison of the role of secondary debulking of relapsed ovarian cancer could be performed.