The economic IVF cost in India has meant the treatment has become accessible to a large number of childless couples. And during an IVF treatment, they often end up with multiple embryos and may not need to use all of them at the same time.
These extra embryos could be chosen for embryos cryopreservation and thawed later when needed. While the test tube baby cost in India is quite affordable, it cannot be denied that thawing the embryos for later use does save couples a fair amount of money as well as time.
The process that makes frozen embryos usable again is known as embryo thawing. The process itself is a reversal of the freezing procedure.
The embryos are taken out from the freezer (where they are stored at -196 degrees Celsius) by an embryologist and warmed to normal body temperature. The entire frozen embryo thawing process is over within two to three seconds. The quick thawing eliminates the risk of ice formation in the embryo's cells during the warming process.
Next up, the test tube baby center's embryologist withdraws the cryoprotectant from the embryos and replaces it with the water that was taken out during the freezing process. This is achieved by incubating the embryos in reducing concentrations of the cryoprotectant while simultaneously increasing the concentrations of water. Over a 20 minute period, the embryos are introduced through various solutions. It is done before the cryoprotectant is completely withdrawn and replaced by water. After being taken out of the freezer, the embryos can be readied for transfer within 40 minutes.
In the top 10 IVF centers in India, embryo thawing ranks among the most sought-after post procedures and with further advancements in the field its popularity is set to grow by leaps and bounds in the near future.
The embryos that offer the highest chances of pregnancy are selected for thawing and subsequent transfer. That doesn't imply that one embryo is better than the other(s). It's important to remember that prior to the transfer and freezing process, only the best embryos were selected.
What is the Survival Rates of Thawed Embryos?
The embryo thawing success rate is around 95% in most of Best Test Tube Baby Centres in India. There is always the possibility that an embryo might not survive the thawing process due to factors beyond human control. The success rate of thawing cryopreserved embryos is 95%. So, it is significantly higher than that of thawing slow frozen embryos (86%).
With such a high success rate, a lot of couples are choosing to freeze their extra embryos with any IVF or surrogacy treatment in India. Since the embryos can be thawed whenever needed, a couple can have another child in the future through it. It is also useful through surrogacy where the embryo will be implanted into the womb of another woman. So, repeat IVF procedure can be avoided to conceive.