Paterna Biosciences grows functional human sperm in lab and creates embryos

9 articles · Updated · WIRED · Apr 23

The Utah-based startup achieved this breakthrough using sperm-making stem cells from testicular tissue, with embryos created as proof of viability, though results are not yet peer-reviewed or independently verified.
This advance could help 10–15% of infertile men who produce no sperm, offering a new option beyond current surgical retrieval methods and potentially costing $5,000 to $12,000 per procedure.
Paterna plans larger studies to assess safety and efficacy before clinical use, while experts note the emotional and financial barriers facing patients, and highlight broader implications for fertility care and future reproductive technologies.

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