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The Guardian Science

Teenager becomes first person to have testicular tissue transplant in UK

A 19-year-old in the UK became the first person to receive a testicular tissue transplant, a procedure that could help boys who lose fertility due to cancer treatment have biological children. The tissue was frozen before chemotherapy and reimplanted to try to restore sperm production. The procedure is the second of its kind worldwide.

What happened

A teenager had his frozen testicular tissue transplanted back into his body to try to restore sperm production after chemotherapy left him infertile. The procedure is a first in the UK and only the second globally.

Why it matters

The procedure offers new hope for boys undergoing cancer treatment who may otherwise be unable to have children, showing progress in preserving male fertility.

Why it belongs here

The story highlights medical innovation that gives people a chance to build families, showing how science can support personal dreams and future possibilities.

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