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Man produces sperm from testicular tissue frozen as a child in breakthrough trial

04.05.2026 17:00 | The Guardian World

Exclusive: Sperm re-transplant offers hope that boys left infertile by chemotherapy could have biological children one dayIn a groundbreaking fertility trial, a man whose testicular tissue was frozen before he underwent chemotherapy as a child to be re-transplanted 16 years later has been able to produce sperm.It is the first time a transplant of cryopreserved prepubertal testicular tissue has been demonstrated to restore sperm production in an adult patient. The 27-year-old man had the sample frozen when he was 10, before undergoing potent chemotherapy as part of treatment for sickle cell disease. Continue reading...

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