- The chemotherapy portion of the study involves the intravenous administration of fludarabine, for six days (Days 8, 7, 6, 5,4, and 3) before transplant, melphalan, for one day (Day 2) before transplant. Antithymocyte globulin, or thymoglobulin, will be given IV daily for 4 days (days 7, 5, 3, and 1 before transplant). This drug also helps to suppress the immune system, allowing the cord blood cells to grow and reproduce.