Implications of oocyte cryostorage for the practice of oocyte donation.

As the efficiency of oocyte cryopreservation has increased rapidly in recent years, oocytes are currently being stored either in the course of IVF treatments or as a fertility preservation measure. These practices may have an impact on the number of available donor oocytes due to two different dynamics: first, a certain percentage of women for whom oocytes were cryopreserved will eventually not use their oocytes and may decide to donate them to others; secondly, especially in the practice of social freezing, women may opt to donate a portion of the retrieved oocytes in 'freeze-and-share' schemes in order to reduce the costs. In this article, we aim to sketch the ethical implications of such developments in general and the issue of payment to oocyte donors in particular.