Storing eggs sperm or embryos

Freezing eggs, sperm, or embryos provides an opportunity to preserve fertility and consider having a family at a later time. Once stored, they can remain frozen for many years with little impact on their potential to result in a pregnancy. However, it is important to understand that not all eggs, embryos, or sperm will survive the thawing process, and in some cases none may remain viable.

For embryos, survival rates  are high, with around 95% typically remaining viable. For eggs, survival is slightly lower, with approximately 90% expected to withstand the thawing process. If an egg or embryo does not survive and additional samples are stored, another can be thawed for use.

Sperm generally tolerate freezing and thawing well due to the large number present in each sample. However, if only a very small number of sperm were frozen, there is a possibility that none may be recoverable after thawing.

Storage is governed by consent. Your clinic can only keep your eggs, sperm, or embryos for the duration you have agreed to, commonly between 5 and 10 years. If you wish to extend this period, updated consent must be provided. For embryos, both partners must agree to continue storage; without this, storage cannot be maintained.

It is also important to consider what should happen to your stored material in the event of death or separation. Legal requirements vary by region, and your clinic will guide you on local regulations.

If you were to pass away, your partner would not be able to use your stored eggs, sperm, or embryos unless you have provided consent. By giving this consent, you are allowing your partner the option to proceed, but the decision remains theirs.

In the case of relationship breakdown, embryos created together cannot be used by either party without mutual agreement. These issues should be carefully considered and discussed before proceeding with storage.

If you decide that you no longer wish to keep your stored material, you can inform your clinic at any time. No eggs, sperm, or embryos will be used without your permission. Ending storage of embryos requires consent from both contributors.

Depending on local regulations, you may also have the option to donate unused eggs, sperm, or embryos to another person or for research purposes. Counselling is usually recommended to help you explore these options and make an informed decision.