AI locates sperm cells in men told they’d never have biological children

BBC

Columbia University’s STAR (Sperm Track and Recovery) system uses AI to scan semen samples at 300 images per second, finding sperm cells invisible to standard lab methods. Azoospermia — the complete absence of detectable sperm — affects 1% of all men. The first birth using STAR was confirmed in 2025; a second baby is due in July 2026.

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