If you – or your child – have to undergo cancer treatment and you are concerned about the consequences for your fertility or that of your child, then you should first talk to your oncologist. He knows the potential harmful effects of the treatment that has been prescribed to you and may be able to give you a prognosis about its impact on your fertility.At the same time you should also contact the Oncofertility team at UZ Brussel. We can give you all the information about the options to safeguard your fertility or that of your child.Cancer treatment should usually be started as soon as possible. Therefore, limited time is available for fertility preservation – sometimes up to two weeks, but sometimes only a few days.Therefore, we have to act quickly: contact.