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When planning for U.S.-Mexico IVF or U.S.-Mexico egg freezing, many people are concerned about one practical question—how long eggs, sperm, and embryos can actually be stored. With so many sources of information, the answers are often contradictory. In response, Dr. Nathan Zhang, founder of IVF USA and an expert in assisted reproduction, has provided a clear explanation.
Frozen sperm generally has the longest storage potential, with successful thawing cases after more than 20 years not being uncommon. Embryos can usually be stored stably for 10 to 15 years, maintaining high survival rates and developmental potential after thawing. In comparison, egg freezing technology started later, with a common storage range of 5 to 8 years, but this number continues to grow as vitrification becomes more widely adopted.
From the perspective of safety and success rates, Dr. Nathan Zhang recommends freezing embryos whenever possible. Eggs are more fragile during thawing and more prone to damage, while embryos are structurally more stable and can withstand long-term cryopreservation. For women over the age of 38, whose eggs are at higher risk of chromosomal abnormalities, freezing embryos combined with IVF-PGT (PGS/NGS genetic screening) can significantly increase implantation success rates and the likelihood of having a healthy baby.
In modern assisted reproduction, vitrification has replaced traditional slow-freezing as the mainstream method. This technique can bring eggs or embryos to ultra-low temperatures within seconds, reducing cell damage from ice crystal formation. With these advances, embryos can retain high thaw survival rates and quality even after more than 10 years of storage, giving those who wish to delay childbearing greater flexibility.
One real-life case involved a cancer patient who froze his sperm before chemotherapy and successfully welcomed a healthy child via IVF 21 years later. This not only proves the feasibility of long-term sperm storage but also offers important reference value for those facing serious health challenges.
Dr. Nathan Zhang founded IVF USA over a decade ago to provide overseas assisted reproduction consultation services, including U.S. egg freezing, U.S. IVF, and third-party reproduction services. With nearly 20 years of deep experience in the global fertility field, IVF USA anticipated the growing demand for diversified and personalized reproductive solutions and entered the Mexico market early, becoming the official Chinese representative for Power Fertility Center Mexico (POWER IVF). Today, Dr. Nathan Zhang’s services have expanded beyond the U.S. to include IVF and egg freezing in Mexico, Japan, Thailand, as well as Taiwan and Hong Kong. By tailoring solutions to individual needs, they provide reliable technologies and advice for people at different stages of their fertility journey. For many, this is not only a medical choice but also a way to preserve a valuable possibility for the future.