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Aging Men's Sperm: Genetic Mutations Double by 70

10/12/2025

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Summary

Story summary

The Wellcome Sanger Institute reports aging men's sperm accumulate harmful genetic mutations.
Sperm mutation rates rise from about 2% in men in their early 30s to about 4.5% in men around 70.
Some mutations gain a reproductive advantage during sperm production, boosting the share of mutated sperm.
The study suggests lifestyle and environmental factors may influence these mutation rates and calls reevaluating paternal age risks for children.

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Story summary

The Wellcome Sanger Institute reports aging men's sperm accumulate harmful genetic mutations.
Sperm mutation rates rise from about 2% in men in their early 30s to about 4.5% in men around 70.
Some mutations gain a reproductive advantage during sperm production, boosting the share of mutated sperm.
The study suggests lifestyle and environmental factors may influence these mutation rates and calls reevaluating paternal age risks for children.