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Embryo Freezing

Embryo freezing, also known as embryo cryopreservation, is a groundbreaking technology in the field of assisted reproductive technology (ART) that has revolutionized the way couples deal with infertility. It offers hope to individuals and couples who aspire to have children but may not be ready to undergo a fresh embryo transfer. The IVF (In Vitro Fertilization) department at Aster CMI Hospital specializes in embryo freezing, ensuring the preservation and future use of embryos with high success rates. In this article, we'll delve into the process of embryo freezing and answer some frequently asked questions about this innovative procedure.

Understanding Embryo Freezing

Embryo freezing is a vital component of the IVF process. It enables couples to preserve and store embryos for a later transfer cycle, which can be particularly beneficial for various reasons:

  1. Medical Reasons: Patients facing medical treatments such as chemotherapy or radiation therapy, which may affect fertility, can opt for embryo freezing to preserve their reproductive options.

  2. Synchronization: Couples can choose to freeze embryos to synchronize with the best time for implantation or when they are emotionally and physically prepared for pregnancy.

  3. Genetic Testing: Embryos can be frozen for genetic testing, allowing the identification of healthy embryos for a successful pregnancy.

  4. Multiple Cycles: If the initial IVF cycle does not result in pregnancy, frozen embryos provide an opportunity for additional transfer cycles.

The Embryo Freezing Process

Embryo freezing at Aster CMI Hospital involves a precise and well-coordinated process:

  1. Ovulation Stimulation: The patient undergoes controlled ovarian hyperstimulation with hormone medications to stimulate the ovaries to produce multiple eggs.

  2. Egg Retrieval: Once the eggs are mature, a minor surgical procedure is performed to retrieve the eggs using ultrasound guidance. The eggs are then fertilized with sperm in the laboratory.

  3. Embryo Development: The fertilized eggs, now embryos, are cultured in a controlled environment for several days. The development and quality of embryos are monitored closely.

  4. Embryo Selection: The most viable and healthy embryos are selected for transfer, while any surplus high-quality embryos can be cryopreserved for future use.

  5. Cryopreservation: The chosen embryos are frozen through a process called vitrification, which involves rapid freezing to prevent the formation of ice crystals. This method ensures that embryos remain viable during thawing.

  6. Storage: The frozen embryos are stored in specialized cryopreservation tanks, where they can remain for an extended period, sometimes years, without compromising their quality.

  7. Thawing and Transfer: When the patient is ready for embryo transfer, the frozen embryos are thawed and transferred to the uterus. The procedure is performed in synchronization with the patient's menstrual cycle.

Embryo freezing is a remarkable advancement in the field of assisted reproduction, providing hope and flexibility to couples facing infertility challenges. Aster CMI Hospital's IVF department excels in embryo freezing, ensuring the preservation and future use of embryos with precision and care. The process, while complex, is designed to offer the best chance of success for patients seeking to build their families, even under challenging circumstances. If you have questions or are considering embryo freezing as an option, consult with our experienced IVF specialists to explore the possibilities it offers for your journey towards parenthood.

Our Doctors

We have some of the best specialists from around the world, they bring years of experience and offer evidence-based treatment to ensure the best care for you.

Our Doctors

We have some of the best specialists from around the world, they bring years of experience and offer evidence-based treatment to ensure the best care for you.


At Aster Hospitals we provide the highest quality of care and a transformative experience for all your healthcare needs. With our network of multi-speciality hospitals, specialised doctors, and world-class technology, we bring global standards of medical care to our patients.

How is embryo freezing different from fresh embryo transfer in IVF?

Fresh embryo transfer involves the immediate transfer of embryos to the uterus following fertilization. In contrast, embryo freezing allows the preservation of embryos for future transfer cycles, providing flexibility in the timing.

What is the success rate of achieving pregnancy with thawed embryos?

Success rates can vary, but in many cases, the success rate for thawed embryo transfers is quite high, especially when using high-quality embryos.

Are there any specific criteria for selecting which embryos to freeze?

Typically, the highest quality embryos are selected for freezing, as they have the best chance of surviving the thawing process and leading to a successful pregnancy.

What happens if I relocate or change fertility clinics while my embryos are in storage?

If you need to relocate or change clinics, your frozen embryos can be safely transported to another facility or storage location. It's essential to coordinate this process with both clinics and ensure proper handling.

What are the costs associated with embryo freezing and storage?

The cost of embryo freezing, and storage can vary depending on the fertility clinic and location. It typically includes initial fees for freezing and ongoing storage fees. It's advisable to inquire about specific costs at your chosen clinic.

Is the process of thawing frozen embryos as effective as using fresh embryos for implantation?

Thawed embryos can be just as effective as fresh embryos, and success rates are often comparable. The viability of thawed embryos depends on various factors, including their quality at the time of freezing.

How long can embryos be safely stored and remain viable for thawing?

Embryos can be stored for many years, and their viability remains intact during this time. Storage duration is often determined by legal and ethical guidelines.

Can I choose to thaw and use only some of the frozen embryos, or must they all be used at once?

You have the flexibility to thaw and use a specific number of frozen embryos, allowing for multiple transfer attempts if desired. Any remaining embryos can be refrozen for future use.

Can frozen embryos be used for research or donated to other couples?

Some individuals or couples may choose to donate their frozen embryos for research or to help others achieve pregnancy. Regulations on donation may vary by region.

Are there any potential risks or side effects associated with embryo freezing or thawing?

Embryo freezing and thawing are generally safe procedures with minimal risks. However, as with any medical procedure, it's essential to discuss any potential risks or side effects with your healthcare provider.