New system improves the quality of frozen horse sperm
(PHYSorg.com Biology)

Cryopreservation is a freezing method of storing spermatozoa to be used for reproduction. Although it is widespread, there is an issue with the ice formation that occurs during the process, which ends up affecting sperm structure and quality. In order to diminish this problem, permeable cryoprotectants are used. These are substances that penetrate tissues and act inside cells in order to stop ice crystals from forming when temperatures go down.