In liquid nitrogen at -196°C, embryos can theoretically be stored indefinitely from a scientific standpoint low temperatures halt all biological activity. Clinical studies have reported successful pregnancies from embryos stored for over 20 years. Maintaining -196°C is critical; even brief temperature fluctuations can compromise viability. At Cryolab, our CryoNest LN2 tanks are engineered for consistent temperature performance, minimising evaporation and protecting your most valuable samples.