Mo-Rez in First- Line (1L) Maintenance Treatment of Non-Homologous Recombination Deficient Ovarian Cancer (Non-HRd OC) [BEHOLD-Ovarian03]

Inclusion Criteria: Participants are eligible to be included in the study only if all of the following criteria apply: * Is at least 18 years of age and the legal age of consent in the jurisdiction in which the study is taking place at the time of signing the Informed Consent Form (ICF). * Has newly diagnosed Stage III/IV (2014 FIGO staging) \[Berek, 2021\] epithelial ovarian, primary peritoneal or fallopian tube cancer with a histologically confirmed diagnosis of high grade serous, high grade endometrioid, clear cell carcinoma, carcinosarcoma or mixed histology. * Has completed first-line platinum-based chemotherapy cycles. Inclusion of IV regimens at Q3W cycles, consolidation regimens and Intravenous (IV)/ Intraperitoneal (IP) and Hyperthermic intraperitoneal chemotherapy (HIPEC) regimens are acceptable. In the event of history of platinum or paclitaxel allergy, alternative agents are allowed (in consultation with the sponsor). At least cycles of first-line chemotherapy must be completed with or without bevacizumab. * Has Response Evaluation Criteria in Solid Tumors, version 1.1 (RECIST v1.1) response determined by investigator after the completion of first-line treatment must be Complete response (CR), Partial response (PR), No evidence of disease (NED), or Stable disease (SD). * Is able to commence C1D1 of study treatment within 9 weeks of the final dose of front-line therapy. Final dose of front-line therapy is defined as the last day that platinum-based chemotherapy w…