Olaparib for Patients With Recurrent BRCA Deficient Ovarian Cancer

This research study is a way of gaining new knowledge about a drug called olaparib in women who have either: 1)never received a PARP inhibitor before to treat ovarian cancer (group 1) or 2)participants who have received a PARP inhibitor before to treat ovarian cancer, with the exception of olaparib (group 2). PARP inhibitors are drugs tht prevent cancer cells from repairing their DNA. In this research study, we are looking to see how well the drug olaparib works in women who have never received a PARP inhibitor for recurrent ovarian cancer as well as those who have received a prior PARP inhibitor and whose cancer has re-grown after receiving that PARP inhibitor.