Frozen Embryo Transfer

Frozen embryo transfer (FET) Process

Frozen embryo transfer (FET) is a lifesaver for couples who are unable to proceed with a fresh embryo transfer due to medical reasons or who want to try again in the future.

According to research, frozen embryo transfers account for roughly half of all embryo transfers performed in assisted reproductive institutions.

What are Frozen Embryo Transfer and How Does It Work?

Embryos that were generated during previous IVF cycles and were kept for later use are known as frozen embryos.

How are embryos frozen?

The resulting embryo is allowed to develop for a few days after the egg and sperm are fertilized in the laboratory.

Because not every embryo can tolerate the freezing process, an embryologist picks the embryos that are suitable for freezing. After that, the embryo is placed in a solution that protects it from freezing damage. The embryo is frozen using a cutting-edge process that involves rapidly cooling it to sub-zero temperatures.

Until the couple agrees to use the embryo, it is preserved in liquid nitrogen.


When is it advisable to use frozen embryo transfer?

If you’re having trouble conceiving, your doctor may consider freezing embryos for later use.

  • Have a fibroid or polyp in the uterine cavity that may interfere with implantation are sick at the time of egg retrieval
  • Are at risk of having ovarian hyperstimulation syndrome because they have not yet built a strong uterine lining for fresh transfer (OHSS)
  • Fresh transfers have resulted in failure cycles
  • Are employing surrogates or donated embryos, or have extra good quality embryos to use in future attempts


What is the procedure for transferring frozen embryos?

Following the retrieval of your eggs and collection of your sperm, the best quality sperm will be chosen and fertilized with the egg under controlled settings in an IVF laboratory.

As Dr Ashish Kale explains the frozen embryo transfer step by step, “the resulting embryos are allowed to grow for 3-5 days.” The embryo will then be frozen until you are ready to use it.

Delaying the transfer gives the woman’s body time to recover from the drugs or injections she received during IVF. This helps to establish a stress-free environment that is more favourable to implantation.


What is the success rate of frozen embryo transfer?

Pregnancy success rates for deferred embryo transfer have been shown to be comparable to those for natural conception.

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