Swine semen extension media to fit every need. Our extenders are manufactured with analytical grade ingredients under a high standard of preparation. Quality control procedures include osmolarity and pH checks as well as biological tests for sperm viability on each extender batch. Viability analysis is performed immediately upon the addition of semen and throughout the claimed life of the extender. Each package of extender is labeled with a lot number and expiration date to facilitate accurate and logical stock control.