Assisted reproduction makes it possible to use frozen eggs or sperm to have children in the future. This is particularly useful to prevent the passage of time from jeopardizing conception, as gametes (especially eggs) tend to lose quality over time.
The issue arises when one of the parents dies. Is it possible to use the sperm or eggs that your partner left frozen to try to have a child through assisted reproduction techniques? It is not always permitted, but we analyze the requirements established by Spanish legislation.
In Spain, the use of reproductive material after a person’s death is regulated by Law 14/2006 of May 26 on assisted human reproduction techniques, but under very strict conditions. It is not a decision that can be freely made after the loss, but rather a scenario that must be planned in advance.
In this regard, the regulations aim to balance several aspects, such as the will of the deceased person, the rights of the future child, and the personal situation of the person who decides to continue the reproductive project alone.
Therefore, prior consent is key in this process. It is necessary for the deceased person to have expressly stated that they authorize the use of their gametes after death. This consent is usually formalized in the context of an assisted reproduction treatment through a signed document. Without this prior consent, it is not possible to use the sperm or eggs, even if cryopreserved samples exist.
There is, however, an exception contemplated by law. When the couple had already started a treatment and embryos had been created before the death, it is understood that the reproductive project was already underway. In these cases, consent is presumed.
In addition to consent, the law establishes a time limit. The use of reproductive material must take place within 12 months following death. This timeframe aims to prevent the decision from being indefinitely delayed and to ensure it is made in a context linked to the life project that existed before the loss, and not to other circumstances.
In very specific situations, a judicial extension may be requested, although this is not common. Therefore, once this period has passed, the material can no longer be used for reproductive purposes.
The Spanish legal framework is, in this regard, more flexible than that of other European countries. In countries such as France, for example, post-mortem use of gametes is prohibited, while in others the regulation is uneven or poorly defined. This lack of a common European regulation reflects the complexity of these situations, in which legal, ethical, and social issues come into play.

The cryopreservation of eggs and sperm has become one of the most widely used tools for preserving fertility. In women, oocyte vitrification allows eggs to be frozen at a time of higher reproductive quality for future use, while in men, sperm freezing is a simple procedure that preserves sperm without significant loss of fertilizing capacity.
This practice has continued to grow in recent years. In fact, the number of women choosing to freeze their eggs has multiplied by 15 in the last decade in IVF-Life group clinics, and nearly 70% do so for social reasons, mainly due to delayed motherhood.
40% of women who freeze their eggs do so between the ages of 35 and 39, and the general recommendation is to do it as early as possible to increase the chances of obtaining higher-quality eggs and improving the success rates of future treatments.