Embryo Freezing

The most cutting-edge technology available today has made it possible for fertility doctors to separately freeze and thaw embryos. The process of freezing embryos includes taking the eggs from the ovaries, fertilizing the eggs to produce embryos, allowing the embryos to develop for a few days, and finally freezing them.

Introduction to Embryo Freezing

Cryopreservation, often known as embryo freezing, is a technique used by doctors to freeze and retain extra embryos produced during IVF, which may also involve intracytoplasmic sperm injection (ICSI). The embryos are frozen in the initial stage of the cryopreservation process.

For eventual usage in IVF, the frozen embryos are then kept and thawed as necessary. Because a woman won't need to endure repeated egg retrievals or take as many drugs, individuals now undergoing IVF can save time and money on subsequent rounds.

People typically decide to preserve their embryos as they want to keep the option of becoming parents in the future open. People frequently think about cryopreservation for reasons including cancer treatment, ageing, or damage risk.

Process of Embryo Preservation

Embryo preservation begins with the removal of mature eggs from the womb, much like egg freezing does. Instead of immediately freezing the eggs, they are fertilized after retrieval by either injecting a single sperm into the egg or combining each egg with sperm in a petri dish.

The embryonic development of the eggs takes around five to six days. Once the eggs have developed into embryos, they can either be placed inside the uterus or frozen using IVF's embryo freezing procedure. The de-thawing technique is more likely to be successful for embryos frozen through vitrification, which entails quickly freezing the embryo at sub-zero temperatures.

Process of Embryo Freezing Transfer

The transfer procedure will start whenever the couple/female is ready to get pregnant. An ultrasound of the uterus is performed at the beginning of the procedure to check on its health. To prepare the uterus for implantation, the patient might also need to take medicine.

Less medicine is required during frozen embryo transfer cycles, and the procedure is often much simpler and less traumatic than enduring a fresh IVF egg transfer.

The doctor will put the embryo(s) into the uterus after they have verified that the patient is prepared for the frozen embryo transfer procedure. To lower the likelihood of multiple pregnancies, it is often advised to transfer only 1-2 embryos.

Comparable to a pap smear is the embryo transfer procedure. To keep the vaginal walls open, the doctor will use a speculum inside of the vagina. The doctor will then insert a tube through the cervix and into the womb with the use of ultrasonography for precision. The embryos are then fed via the tube and placed in the uterus.

We seldom have to administer sedatives during the procedure, and it is often painless. Following the transfer of frozen embryos, some women may have cramping or pain as a consequence.

Risk Factors Associated with Embryo Freezing

According to research, the freezing of embryos has no negative effects on IVF-born children later on. IVF success rates are unaffected by the embryo's storage period.

With advances in technology, there is almost any difference in pregnancy rates between fresh and frozen embryos. Additionally, because the stimulation procedure during frozen embryo transfer is softer and the woman's hormone levels are closer to normal, pregnancy rates may increase as a result.

When an embryo thaws, any ice crystals that accumulated during the long freezing process might harm it. It is for this reason that vitrification is the favoured method of cryopreservation. According to research, infants born from frozen embryos do not have a higher risk of birth abnormalities than children born normally.


Fertilized eggs are frozen during the embryo freezing procedure and kept for later use. It can aid in preserving fertility and provide choices for later pregnancies. Consult a gynaecologist, fertility expert, or primary care physician in Amritsar if thinking about embryo cryopreservation.

1. How long do freezing embryos last?

Hospital facilities, generally a lab, or for-profit reproductive medicine institutions store and maintain frozen embryos. They can be kept for up to ten years without risk.

2. Is freezing the eggs painful?

All patients will endure anaesthesia for around 20 minutes, making the procedure relatively painless.

3. Do embryos suffer any harm from freezing?

Unfortunately, not all embryos will withstand the freezing and thawing process. Even when an embryo survives, it frequently loses one or two cells. The embryo will frequently survive and continue to grow.

4. How do freezing embryos work?

Embryos are created by fertilizing eggs after they have been removed from the ovaries, growing them for a few days, and then freezing them.

5. How many eggs should a person freeze to have two children?

Physicians advise freezing at least 10-15 eggs for each intended pregnancy attempt to make sure enough eggs are frozen when the patient needs to use them.

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