RecruitingDrug trialA Study of Niraparib in Combination With Abemaciclib for Late Line Treatment of Ovarian Cancer (NICHOL TRIAL)This is an interventional trial. The goal of this clinical trial is dose finding. There are two phases: phase Ib to determine the MTD and recommended phase II dose of niraparib in combination with abemaciclib in patients with advanced ovarian cancer. Target population will be patients (woman, age \> 18 years) with epithelial ovarian, fallopian tube or peritoneal cancer treated with at least 2 lines of therapy.