Provided herein are methods of producing erythrocytes from hematopoietic cells, particularly hematopoietic cells from placental perforate in combination with hematopoietic cells from umbilical cord blood, wherein the method results in accelerated expansion and differentiation of the hematopoietic cells to more efficiently produce administrate erythrocytes. Further provided herein is a bioreactor in which hematopoietic cell expansion and differentiation takes place.