This study proposes a nontoxic immunotherapeutic approach to extend overall survival in patients in complete remission. Most patients with ovarian cancer achieve complete clinical remission after optimal debulking surgery and first-line platinum-based chemotherapy. However, most patients, despite high response rates to first-line treatment, will relapse and undergo subsequent chemotherapy. Generally, the progression-free interval between treatments becomes shorter with each relapse, and the patient eventually dies of the disease.