Man produces sperm from testicular tissue frozen as a child in breakthrough trialExclusive: Sperm re-transplant offers hope that boys left infertile by chemotherapy could have biological children one day In a groundbreaking fertility trial, a man whose testicular tissue was frozen before he underwent chemotherapy as a child to be re-transplanted 16 years late...https://www.theguardian.com/society/2026/may/04/man-produces-sperm-from-testicular-tissue-frozen-as-a-child-in-breakthrough-trial#Men'shealth #Science #UKnews #Reproduction #Biology #TheGuardian(Mon, 4 May 2026 14:00:24 +0000)