Collected in the USA

Foetal Bovine serum (FBS) is the liquid fraction of the clotted fetal blood. After separation by centrifugation, the raw FBS is then dispensed into containers and frozen. A batch of Sterile filtered FBS is obtained by thawing, pooling and filtration of raw FBS through a series of membrane filters culminating in a sterile 0.1 micron filter, before being aseptically dispensed.