The process of cryopreservation, popularly known as egg freezing, has helped women get pregnant, beating the constraints of their biological clock. Cryopreservation of oocytes serves as a valuable tool in human assisted reproductive techniques. It also permits cancer patients to preserve their reproductive capacity before undergoing potentially sterilizing cancer treatments. In addition to this, the procedure can also benefit women with other medical conditions leading to premature menopause, and healthy women wanting to delay childbearing for a variety of reasons. Although the survival rate of the eggs is a complex issue, the process ensures that the frozen eggs are viable for a prolonged period of time.
“Vitrification is a much more effective form of “flash freezing” that reduces the chance of ice crystals forming inside the egg. The process of Cryotec vitrification is a step forward to the successful form of vitrification, increasing the egg survival rate to as close as 100%,” suggests Dr Goral Gandhi.
“Cryotech helps overcome the deviations of its predecessors. It reduces the chances of errors that can destroy the viability of stored eggs by damaging their cellular structure,” explains India's senior embryologist and trainer Dr Goral Gandhi. She further elaborates upon how cryotech method is better than other vitrification methods (which has also produced outstanding results when it comes to egg viability).
“To be precise, the egg survival rate refers to the percentage of eggs that are considered viable after they have been frozen and thawed. It does not in any way guarantee that they will result in successfully fertilized embryos that, when implanted via IVF, result in guaranteed babies”, adds the best embryologist.
One of the key advantages of the new Cryotech method is that it is one of the most trustable methods of cryopreservation. Other than providing the highest recorded success rate, the process also protects oocytes and embryos of physical damages and contaminations of any kind during their storage in liquid nitrogen. The new cryotech vitrification method is a relevant upgrade to other existing methods of vitrification.
The method includes improved solutions with optimum viscosity. The construction of the Cryotech vitri plates and holders is such that it is practically impossible to lose embryos or eggs during washing. Visualization of the eggs and embryos is with the same focus, and therefore easy during loading and washing.
It is estimated that in young patients with good quality eggs, one needs to thaw about seven frozen eggs to result in one live birth. This number is similar to the number of fresh eggs required to result in a live birth. While the Cryotech technique is currently only available at a handful of egg freezing clinics in India, it does represent what is likely to be the future of egg freezing.
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