A Clinical Study Evaluating a Combination of Oregovomab and Niraparib in Adult Women With Platinum Sensitive Recurrent Ovarian Cancer.

Phase 2 single arm open label study to evaluate the combination of oregovomab and niraparib as a combinatorial immune priming strategy in subjects with platinum sensitive recurrent ovarian cancer. Approximately 15 subjects will be screened to enroll approximately 10 evaluable subjects. The study will include: * Screening period up to 28 days prior to start of study treatment. * Treatment period up to 24 weeks. * Post-treatment follow-up period: * Safety Follow-up: all subjects will be followed at least 30 days after end of treatment for safety. * Long Term Follow-up: all subjects will be followed for survival approximately every 3 months for 1 year, until death, withdrawal of consent, lost to follow-up, or sponsor decision to close the study; or whichever comes first.