Article

Generative AI systems conflate two distinct pregnancy-dating algorithms

2026-07-08

Abstract excerpt

<title>Abstract</title> <p>Generative AI is increasingly used for clinical calculations yet may recite one method while computing another. Using pregnancy dating as a deterministic test case, we compared Naegele’s calendar rule with the fixed 280-day count: across all 78,163 last-menstrual-period dates (1812–2025) they diverged in 55.7% of cases and in every leap-day interval. Auditing five AI systems, three misl...

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Literature Corpus work: bbc3a1c9-ccb6-536c-8156-e7924e2561f9
DOI: 10.21203/rs.3.rs-10270390/v1

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