This phase II trial is to see if combining bevacizumab with low-dose cyclophosphamide works in treating patients with ovarian epithelial or primary peritoneal cancer that has come back or spread to other parts of the body. Monoclonal antibodies, such as bevacizumab, can block cancer growth in different ways. Some block the ability of cancer cells to grow and spread. Others find cancer cells and help kill them or deliver cancer-killing substances to them. Drugs used in chemotherapy, such as cyclophosphamide, work in different ways to stop tumor cells from dividing so they stop growing or die. Combining bevacizumab with cyclophosphamide may kill more tumor cells.