European Society of Human Genetics May 23 2025 A case in which a sperm donor was later found to be carrying a cancer-causing pathogenic variant in his gametes has highlighted the problems of regulating gamete donation at European and international level, the annual conference of the European Society of Human Genetics will hear today (Saturday). Dr Edwige Kasper, a specialist in genetic predisposition to cancer at the Rouen University Hospital, Rouen, France, will say that the lack of cross-