CELLect Silver is collected from a U.S.D.A. regulated and monitored abbatoir by technicians who work "on-site" where the fetal blood is aseptically collected via cardiac puncture. This raw material is transported to the production facility where it undergoes sterilization via filtration with multiple 0.1 micron filters. The care and diligence taken in handling the fetal serum minimizes cell lysis and other detrimental factors thereby reducing possible lysozyme and hemoglobin contamination. This translates into increased performance in the final product. It is supplied sterile, with no detectable mycoplasma or viral infection.