Polypeptide marker antigens for detecting the presence of autoantibody biomarkers associated with ovarian cancer recurrence, each of the polypeptide marker antigens binding specifically to at least one autoantibody marker. An antibody binding assay for detecting the presence of autoantibody biomarkers associated with ovarian cancer recurrence, and methods for performing the assay. Methods for determining ovarian cancer recurrence in an ovarian cancer patient. A method for isolating antibodies specific for ovarian cancer by their affinity to the polypeptide marker antigens, and antibodies isolated by that method.
