Abstract
Goal The aim of this official guideline, which was coordinated by the German Society of Gynaecology and Obstetrics (DGGG) together with the German Society of Urology (DGU) and the German Society of Reproductive Medicine (DGRM), is to provide consensus-based recommendations for counselling and the use of fertility preservation measures in prepuscent girls and boys and for patients of reproductive age by evaluating the relevant literature. Methods This S2k guideline was developed by a structured consensus of representative members of various professional associations on behalf of the guideline commission of the DGGG, DGU and DGRM. Recommendations Recommendations for counselling and the use of fertility-preserving measures in patients are presented, taking into account their life circumstances, the planned oncological therapy and the individual risk profile, as well as the procedure for selected tumour entities.