18/07/2025
The primary factors influencing the success of egg freezing are a woman's age at the time of freezing, the number and quality of eggs retrieved, and the method of cryopreservation used. Additionally, the expertise of the fertility clinic and individual health factors can also play a significant role.
Factors impacting egg freezing success:
Age at Freezing:
Younger women generally have higher quality eggs, leading to better chances of successful fertilization and pregnancy later on. As women age, egg quality and quantity decline, decreasing the likelihood of successful outcomes.
Number of Eggs Frozen:
A larger number of retrieved and frozen eggs increases the probability of having viable embryos after thawing and fertilization.
Egg Quality:
Egg quality is directly linked to a woman's age. Younger women tend to have healthier eggs with a higher chance of successful fertilization.
Cryopreservation Method:
Vitrification (rapid freezing) is the preferred method due to its higher success rates compared to slow freezing.
Clinic Expertise:
The experience and expertise of the fertility clinic in performing egg retrieval, cryopreservation, and subsequent thawing and fertilization processes significantly impact success rates.
Individual Health Factors:
Underlying health conditions, such as hormonal imbalances or other reproductive issues, can affect egg quality and the overall success of the procedure.
Thawing Survival Rate:
While modern thawing techniques minimize damage, some eggs may not survive the thawing process, impacting the overall success.
Other considerations:
Storage Duration:
There is no evidence to suggest that the length of time eggs are frozen impacts their viability.