How long can frozen eggs, sperm, and embryos be preserved in the US and Mexico?

2025-09-01 17:44:06，浏览量： 4次

 

With the growing demand for assisted reproduction, IVF in the US and Mexico and egg freezing in the US and Mexico have become increasingly popular topics. More and more people, when planning for fertility, not only consider the possibility of natural conception but also think about freezing eggs, sperm, or embryos as a safeguard for the future. So, how long can these “seeds of life” be preserved at ultra-low temperatures, and will their quality be affected?

 

Thanks to advances in modern cryobiology and vitrification, the preservation methods for eggs, sperm, and embryos have become increasingly refined. Vitrification cools cells within seconds to -196°C in liquid nitrogen, placing them in a “hibernation-like” state and preventing ice crystal damage. This technology is now widely used in reproductive centers across the US and Mexico, providing strong support for IVF and egg freezing.

 

For egg freezing, doctors first use scientific ovarian stimulation and painless egg retrieval to obtain mature eggs. After treatment with protective solutions, the eggs are rapidly frozen and stored in liquid nitrogen. Their quality and viability remain unchanged over time. This offers greater flexibility for women of advanced maternal age or career-oriented women, giving them more reproductive possibilities in the future.

 

The principle of sperm freezing is similar. Once treated with protective agents, sperm are frozen, and their biological activity completely stops, allowing quality to remain stable. This technology is particularly important for men who need to preserve fertility early due to illness, treatment, or other reasons.

 

Embryo freezing is usually carried out on the third or fifth day after fertilization. Blastocysts formed on day five are often combined with IVF-PGT screening before freezing to ensure genetic and chromosomal health. Stored in liquid nitrogen, embryos do not continue to develop or age. Therefore, even after many years, thawed embryos can still maintain strong developmental potential. This explains medical cases where a “mother is 26 years old, but the child comes from a 27-year-old embryo,” something made possible by science and technology.

 

However, the ultimate success of freezing depends heavily on laboratory standards and the experience of doctors. If freezing or thawing procedures are not performed properly, even high-quality eggs or embryos may be damaged. That is why choosing an advanced and experienced medical team is crucial.

 

On the path of reproductive choices, every step deserves careful consideration. From IVF in the US and Mexico to egg freezing in the US and Mexico, science and technology have created more possibilities for the future. But the most critical factor is finding a trusted professional team to design safe and effective preservation and treatment plans.

Dr. Nathan Zhang founded IVF USA and has been engaged in overseas assisted reproductive consulting services for more than ten years, providing US egg freezing, US IVF, and third-party reproduction services. With nearly 20 years of experience in international assisted reproduction, IVF USA expanded early into the Mexican market, becoming the official Chinese representative of Power Fertility Center Mexico POWER IVF. Today, Dr. Nathan Zhang’s services extend beyond the US to IVF and egg freezing in Mexico, Japan, and Thailand, as well as regions such as Taiwan and Hong Kong. IVF USA continues to provide personalized support for people at different stages of fertility planning, making every choice about life more confident and hopeful.