If your IVF treatment results in more embryos than can legally be replaced at one time into the uterus during embryo transfer, the surplus embryos can be frozen and stored for possible use in a later treatment, should you not become pregnant, or if you decide to have more children at a later date (see transfer using frozen (thawed) embryos).
In order to be able to have embryos frozen, you will need to complete the form 'Surplus Embryos' (see consent forms). This document enables you to decide what you would like us to do with your additional embryos, should you decide that you no longer require them.  
If you decide that the surplus embryos are to be frozen and stored, you will be informed a few weeks after your transfer, how many embryos we were able to preserve. Please note that this information is never given verbally, in order to avoid misunderstandings.

You can also donate you excess embryos (anonymously) to couples who rely on donor material for their only chance of getting pregnant. See donation, the main points and embryo donation.
Frozen embryos will be stored free of charge up until the end of the year in which they were frozen. Thereafter, a yearly charge will be implemented (see financial), unless you are covered by the Belgian Mutuality.