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Participants were prospectively followed until delivery, and PE cases were diagnosed during follow\u2010up. Among 1400 enrolled women, 940 delivered at our institution; 30 were later diagnosed with PE, and 28 were included in the metabolomics analysis. The control group encompassed 28 healthy women, matched for maternal age and body mass index. A targeted metabolomics approach analyzed a 41\u2010metabolite panel using liquid chromatography coupled with tandem mass spectrometry. Eight metabolites below the detection limit in \u226515% of samples were excluded.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Compared to the control group, univariate analysis revealed lower methionine and glutamine concentrations and elevated threonine levels in the case group. Classification models based on the remaining 33 metabolites, using leave\u2010one\u2010out cross\u2010validation, achieved 100% sensitivity but had limited specificity (21%). A reduced four\u2010metabolite model maintained 100% sensitivity with 50% specificity, while our refined, best\u2010performing six\u2010metabolite model achieved 100% sensitivity and 61% specificity with a negative predictive value of 100%.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Our models demonstrated considerable potential as diagnostic tools for ruling out PE, thereby reinforcing their future applicability in screening and monitoring strategies during gestation to improve clinical decision\u2010making and alleviate the burden on healthcare systems.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ijgo.70983","type":"journal-article","created":{"date-parts":[[2026,3,31]],"date-time":"2026-03-31T08:55:42Z","timestamp":1774947342000},"page":"1644-1654","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Second\u2010trimester multimetabolite panel for early preeclampsia rule\u2010out"],"prefix":"10.1002","volume":"174","author":[{"given":"Matthews Silva","family":"Martins","sequence":"first","affiliation":[{"name":"Department of Physiological Sciences, Health Sciences Center Federal University of Esp\u00edrito Santo  Vitoria ES Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4881-8488","authenticated-orcid":false,"given":"Julyane N. 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