It consists of a transfer of previously frozen embryos from couples who, having achieved pregnancy through in vitro fertilization (IVF), donate surplus embryos to other couples or women who may need them. In order to donate embryos it is necessary that parents meet the same requirements and pass the same controls that the law requires of eggs or sperm donors.

When is it indicated?

  • When we cannot use eggs and sperm for in vitro fertilization (IVF), because they are not being produced (early menopause, hidden ovarian failure and secretory azoospermia) or because there is a potential risk of genetic disease transmission that cannot be identified or eradicated by prenatal or preimplantation genetic diagnosis (PGD) and therefore there would need to resort to double donation of eggs and sperm.
  • Couples and women with longstanding infertility who decide to go for a simpler and more economical solution, after failing to succeed during previous assisted reproduction treatments.
  • Patients with repeated miscarriages with no apparent cause.

At Fertilab we have a large bank of embryos of different blood groups and phenotypic characteristics, which allows us to choose and assign those that are more similar to the partner or recipient woman.


  • It allows you to experience pregnancy and childbirth, which children adoption would not allow you to.
  • Its cost, much lower than a double donation (sperm and egg donation).

The possibility of pregnancy varies depending on the source, the number and quantity of thawed embryos; currently, the success rate is around 30-40%.


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