How has cryogenic technology changed IVF outcomes over the past two decades and what equipment developments have had the greatest clinical impact?
The single most significant cryogenic technology development in IVF over the past 20 years is the widespread adoption of vitrification, which replaced slow-freeze as the primary cryopreservation method for oocytes and embryos in most UK clinics during the late 2000s and early 2010s. Vitrification achieves cooling rates greater than 10,000°C per minute, converting intracellular water to a glass-like amorphous solid without ice crystal formation. Survival rates for vitrified oocytes improved from below 60 per cent with slow-freeze to above 90 per cent with optimised vitrification protocols, fundamentally changing the clinical case for egg freezing and elective embryo banking.
The second significant development is the move from liquid phase to vapour phase storage in biological dewars, driven by HFEA guidance on cross-contamination risk. The third development is the introduction of closed high security carrier systems, which enclose the sample within a hermetically sealed straw during vitrification, further reducing contamination risk and improving handling consistency across different operators. Cryolab supplies the CBS High Security vitrification kit range and vapour phase storage dewars that represent the current standard of cryogenic technology in UK IVF practice. Contact Cryolab to discuss how your laboratory’s equipment reflects current best practice.
