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Egg Freezing Success Rates: A Global Comparison of Outcomes in Leading Countries

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Egg freezing, or oocyte cryopreservation, has become an increasingly popular fertility preservation method for women across the globe. With technological advancements and the rise in success rates, egg freezing is now a viable option for those wishing to postpone parenthood. However, the success rates of egg freezing can vary based on a multitude of factors, including the patient's age at the time of freezing, the egg freezing technique employed, and the expertise of the fertility clinic. This article aims to provide a global comparison of egg freezing success rates in leading countries offering this service.

Understanding Egg Freezing Success Rates

The success rate of egg freezing refers to the likelihood of achieving a successful pregnancy and subsequent live birth using frozen-thawed eggs. This rate is influenced by various factors such as the age of the woman when the eggs were frozen, the freezing and thawing technique used, and the overall quality of the eggs.

It's essential to note that higher success rates are generally seen in younger women, typically those under 35, due to the higher quality and quantity of eggs. However, advancements in technology, particularly the adoption of a rapid freezing method known as vitrification, have contributed to improved success rates across different age groups.

Egg Freezing Success Rates in Leading Countries

Several countries stand out for their high egg freezing success rates, owing to advanced technology, extensive research, and experienced healthcare professionals.

United States

The United States boasts some of the most advanced fertility clinics globally, with egg freezing success rates reflecting this excellence. According to the Society for Assisted Reproductive Technology, the live birth rate using frozen eggs is about 47.1% for women under 35. As age increases, this percentage decreases, yet it remains relatively high compared to global averages.


Spain is renowned for its expertise in fertility treatments. Spanish clinics report success rates for egg freezing that are among the highest in Europe. Spanish clinics often utilize vitrification, contributing to high survival rates of frozen-thawed eggs and subsequent high pregnancy rates.


Denmark, with its progressive healthcare system and state-of-the-art fertility clinics, has seen promising success rates in egg freezing. Danish clinics report high survival rates for frozen-thawed eggs and subsequent pregnancies, underscoring their expertise in fertility preservation.


Australia has made notable strides in egg freezing, with the success rates reflecting these advancements. Australian clinics report high survival rates for frozen-thawed eggs, and subsequent pregnancy rates are comparable to those in the United States and Europe.


Israel, a leader in fertility treatments, has seen high success rates in egg freezing due to the country's advanced technology and commitment to research. Israeli clinics report high survival rates for frozen-thawed eggs, with subsequent pregnancies and live birth rates comparable to other leading countries.

Factors Affecting Egg Freezing Success Rates

While the global comparison provides a useful overview, it's essential to understand the factors influencing egg freezing success rates:


The age of the woman at the time of egg freezing significantly impacts success rates. Younger women, typically those under 35, have a higher quantity and quality of eggs, leading to higher success rates.

Freezing and Thawing Techniques

The methods used to freeze and thaw eggs can impact their viability. Vitrification is currently the most effective technique, resulting in higher survival rates for frozen-thawed eggs.

Fertility Clinic Expertise

The experience and skill of the fertility clinic and its staff play a crucial role in egg freezing success rates. Clinics with extensive experience in egg freezing and thawing typically report higher success rates.


Egg freezing success rates vary globally, with leading countries like the United States, Spain, Denmark, Australia, and Israel reporting high rates due to advanced technology, extensive research, and experienced healthcare professionals. Despite these variations, it's crucial to remember that individual circumstances greatly influence success rates.

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