Egg preservation, also known as oocyte cryopreservation is one of the best ways of fertility preservation in women. Egg preservation is an assisted reproductive technology (ART) method that enables a woman to save the ability to get pregnant in the future. The frozen egg can be stored for many years and can be thawed and used for pregnancy when required, making it a very desirable fertility preservation option for many women.
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Age is one of the most important factors that affect female fertility and hence egg freezing is preferred by women who are not yet ready to get pregnant but wish to get pregnant in the future. Social egg freezing is preferred by women who are getting older without a partner or who wish to get married later due to some other commitments. Egg freezing is also an option if a woman is affected by certain conditions or illnesses that may affect fertility.
Depending on the pace of freezing, there are two main types of freezing the egg:
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As already mentioned, vitrification uses flash cooling the oocytes by directly immersing it into liquid nitrogen. The desired temperature to be attained is -196ºC as at this temperature all the biological activity practically stops. By immersing the cell directly into liquid nitrogen, this temperature is instantly attained as compared to slow freezing which may take much more time.
The process of vitrification is as follows:
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The eggs can be kept frozen in this way for many years. When pregnancy is desired, the eggs are thawed and used as required.
The most important advantage of vitrification over slow freezing is that it significantly lowers the risk of crystal formation. Crystal formation is the single biggest threat to the egg freezing process as it may rupture the cell membrane. Many studies show that the success rates of vitrification (defined by the percentage of eggs that survive the thawing process) is significantly higher than slow freezing, making it the more preferable option for egg freezing. Cloudnine is one of the best pregnancy and maternity care hospitals in India. Cloudnine provides you with a wide range of services and facilities including oocyte cryopreservation. Our experts are highly qualified and experienced in performing procedures like vitrification for egg preservation. We also provide you with world-class egg preservation facilities, enabling you to preserve your eggs as long as required.
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