Cryopreservation is a process of freezing at cryogenic temperatures (normally with liquid nitrogen). For stem cells to maintain viability for many years they have to be preserved at temperatures below minus 180ºC.

The storage process of stem cells isolated from the umbilical cord begins with the separation of these cells from the remaining cells in the umbilical cord, through an enzymatic digestion of the cord. These cells are then placed in a culture medium that allows for their multiplication.

The isolated umbilical cord cells are subject to a rigorous quality control with morphological analysis and flow cytometry. This control confirms that the isolated cells are mesenchymal stem cells.

The cells are then cryopreserved.