MethodsPublished 30 September 2026Investigation into biomarkers to predict preterm birth (INSIGHT): a longitudinal UK pregnancy cohort for spontaneous preterm birth researchRaphaella Jackson · Carlotta Valensin · Evonne Chin-Smith · Natalie Suff · Andrew H. Shennan · Natasha L. Hezelgrave · Rachel M. TribeFrontiers in Reproductive Healthdoi 10.3389/frph.2026.1926506