Embryo Freezing: Process and Benefits

One of the most advanced methods of fertility preservation is embryo freezing. With the progress of medicine and assisted reproduction, individuals and couples have the opportunity to preserve healthy embryos for later use. This can help with the treatment of planning a family or the treatment of fertility.

If you are undergoing treatment to freeze your embryo, are planning to postpone your pregnancy, are dealing with a health condition that will affect your ability to conceive, or if you want to optimize your reproductive health and opportunities, freezing your embryos is one of the safest things you can do. Cryopreservation as a method is constantly being improved. Frozen embryos and their transfer are one of the most widely practiced methods of assisted reproduction.

In this article, you will find useful information regarding freezing embryos, the benefits of freezing embryos, and statistics regarding the success and failure of this method, as well as some risks and frequently asked questions.

What is Embryo Freezing?

Embryo freezing or embryo cryopreservation is a method of preserving fertility where a fertilized egg is frozen and stored for later use. Embryo cryopreservation is most commonly done through assisted reproductive technology and more specifically, through In Vitro Fertilization (IVF). In this method, the egg is retrieved from the ovaries of the female and is fertilized in the lab. After the embryos grow, they can be preserved for months or even years, waiting for the couple or individual to be ready to resolve their pregnancy.

There are many cases where embryo freezing is suggested. Here are some of them.

– Couples undergoing IVF treatment

The following people may consider embryo freezing:

— Women who wish to delay pregnancy for personal or career-related reasons

— Cancer patients who want to freeze embryos before going through chemotherapy or radiotherapy

— Patients with medical conditions where fertility is threatened

— Those who want to undergo IVF in order to have several opportunities for conception in a single cycle of IVF

How Does Freezing Embryos Work?

There are several steps, all of which are carefully monitored, that are involved in the freezing process of embryos. These steps include:

1. Ovarian Stimulation

IVF involves the use of fertility drugs that aid in the development of a number of mature ova. In a typical menstrual cycle, the ovaries only release one. Menstrual cycles generally release one ovum, but IVF helps a woman develop a number of mature ova. During this stage of embryo development:

— Women undergo a series of hormone injections and are monitored with ultrasound and blood tests. These tests check the growth of ovarian follicles and the levels of hormones in the blood. This stage lasts on average from 10 to 14 days.

2. Egg Retrieval

Once the eggs are mature, the retrieving of eggs is done through a medical procedure that is also an outpatient procedure. In this procedure:

— A thin needle is guided through the vaginal wall to collect the eggs from the ovarian follicles. Sedation is provided for comfort. This procedure takes 20 to 30 minutes on average.

3. Fertilization

Eggs that are retrieved and then fertilized in a laboratory can either undergo:

— Conventional IVF or Intracytoplasmic Sperm Injection (ICSI)

4. Embryo Development

For several days, embryologists monitor the growth of embryos. Embryos are frozen typically on:

— Day 3 (cleavage stage) and Day 5 or 6 (blastocyst stage). Generally, embryos that are in their blastocyst stage have higher implantation potential.

5. Vitrification (Freezing)

Vitrification is the modern freezing method that is rapid and used by fertility clinics. Vitrification also:

— Prevents the formation of ice crystals and damages the embryo cells.

– Enhances thawing survival rates

Embryos are stored in liquid nitrogen storage tanks at approximately -196°C.

6. Long-Term Storage

Embryos continue safely stored when not immediately needed.

When Pregnancy is achieved:

– Embryos are thawed.

– Embryos prepared for transfer.

– Embryos are transferred to the uterus via a frozen embryo transfer (FET) procedure.

Benefits of Embryo Freezing

There are many medical, emotional, and financial benefits to freezing embryos.

Preserves Future Fertility

Fertility preservation is a major benefit. Embryos are stored when fertility potential is at the optimal level, and are used in the future at the convenience of the family.

This is a great option for:

– Women who are delaying starting a family

– Couples who want to focus on their careers

– Individuals who will undergo medical treatments.

Higher Pregnancy Opportunities

A single IVF cycle creates numerous embryos. Embryos can be frozen for use in future transfer cycles, rather than enduring repeated egg retrievals.

Reduced Physical Burden

Subsequent frozen embryo transfers do not require:

– New ovarian stimulation

– New egg retrievals

– New exposures to anesthesia.

This makes future fertility treatments easier.

Cost Savings

Embryo storage has a yearly cost, but future frozen embryo transfer cycles cost less than a complete IVF cycle.

Utilizing previously frozen embryos enables patients to spend less.

Helps Cancer Patients

Chemotherapy and radiation can impact the ability to conceive.

Freezing embryos allows individuals to maintain their ability to reproduce after undergoing a precursor medical treatment. This is particularly helpful for cancer patients post chemotherapy.

HIGHER SUCCESS RATE WITH IVF

In recent years, many fertility clinics have adopted a freeze-all strategy. This is due to the following considerations:
– A later time may be better for the uterine environment.
– Hormone levels can normalize prior to transfer.
– The results of the frozen embryo transfer can potentially surpass the results of the fresh transfer.

FLEXIBLE FAMILY PLANNING

The following can be achieved with frozen embryos:
– Delayed parenthood
– Additional siblings
– Additional family members
Couples can decide to use previously frozen embryos and attempt to achieve a pregnancy years later.

WHO CONSIDERS EMBRYO FREEZING?

Generally consider embryo freezing if you are:

DELAYING PREGNANCY

Preserving the option to not have children at this time.

UNDERGOING IVF

During IVF if you happen to have multiple viable embryos.

CANCER PATIENT

During chemotherapy and post therapy.

HAVING A MEDICAL CONDITION

Endometriosis, autoimmune disorders, genetic disorders and disorders of the ovary, to name a few, can impact your ability to have children and when.

LGBTQ+ COMMUNITY

Embryo freezing can be part of the family planning strategy.

FROZEN EMBRYO SUCCESS

A variety of factors can play a role in frozen embryo success such as:

-Age at embryo creation
-Quality of the embryo
-How well the embryo was made (laboratory techniques)
-How healthy the uterus is
-What the fertility diagnosis is
The advent of modern vitrification techniques has changed the game when it comes to frozen embryos.
Many clinics report greater than a 90 – 95% success rate in embryos thawing and continuing on to be used. The pregnancy rates of blastocysts that are frozen embryos and transferred are on par, if not better, than embryos that were transferred that are fresh.

How Long Can Embryos Stay Frozen?

Most studies indicate that embryos can safely remain frozen for many years without a significant decline in viability.

There are even documented cases of successful pregnancies resulting from embryos frozen for more than 10 years.

When embryos are frozen, the majority of biological activity is halted. Because of this, when embryology is performed correctly, the length of freeze should not adversely impact the viability of the embryo.

Are There Any Risks?

• Freezing embryos is a relatively safe process, although there are still a few risks.
• Loss of Embryos in the Freezing/Thawing Process
• Although relatively rare, some embryos will not survive freezing and thawing.

Risks of IVF

• Some other risks that are associated with the entire IVF process include:
• Ovarian Hyperstimulation Syndrome (OHSS)
• Complications from the procedures
• Side effects of the medications

Emotional Considerations

Some couples and individuals may have emotional and ethical concerns regarding the long term storage of embryos and these may be impacted by the decisions they have to make.

What’s the Difference Between Freezing Embryos and Freezing Eggs?

Both embryo freezing and egg freezing are great methods for preserving fertility. The best method is the most applicable to the personal circumstance.

Cost of Freezing an Embryo

The cost of embryo freezing is dependent on many factors. Some may include the geographic location, the fertility clinic, the requirements of the IVF process, and the length of time the embryos are frozen. Some common costs may include:

– Fees for IVF cycles
– Fees for freezing embryos
– Fees for yearly storage
– Fees for transferring embryos after freezing

Patients should ask their fertility specialists about different prices and financing.

Conclusion

Freezing embryos has revolutionized not only preservation of fertility, but reproductive medicine as well. This technology has provided individuals and couples the ability to store embryos for future use, and thus provided greater flexibility as well as increased chances of pregnancy and a peace of mind.

Whether you are seeking to undergo IVF, preserve your fertility before a medical intervention, freeze your embryos to delay your first pregnancy, or use frozen embryos to expand your family, the science of embryo freezing has been a highly successful option as it is supported by a significant body of scientific evidence and advancement.

An experienced fertility specialist will help you better understand if embryo cryopreservation suits your reproductive goals or long-term family plans.

Visit our centre Delhi/Noida