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Introduction
Cryopreservation or cryostorage of gametes and embryos involves storage at ultra-low temperatures (under -140°C). The preservation refers to the ability to maintain cellular functionalities and viability after thawing or warming.
Liquid nitrogen is inert, odorless, colourless, non-corrosive, non-flammable, and extremely cold. It has been the substance of choice for cryostorage in most applications as it achieves temperatures of -196°C (-320°F) when materials are fully submerged.