ArticleHealth science reports2026
Utility of Admission and Intrapartum Cardiotocography for Predicting Umbilical Artery pH Status at Birth: A Retrospective Cohort Study in Iran.
Article in Health science reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background and Aims: Intrapartum cardiotocography (CTG) is used to detect fetal hypoxia, but static classifications can miss progressive compromise. This study analyzes longitudinal CTG trends to find early predictors of umbilical artery acidemia (pH < 7.20) at birth. Methods: A retrospective cohort study analyzed vaginal deliveries (2019-2022) at a tertiary hospital. Singleton pregnancies were stratified into cases (pH < 7.2, Results: We found that neonatal acidemia at birth was predicted by elevated baseline FHR at admission, contrasted with decreased FHR during active first-stage and second-stage labor. Progressive reduction in BTBV showed a strong association at all stages of labor, most prominent at second-stage labor, absent accelerations during first-stage labor, and presence of decelerations, especially late decelerations during second-stage labor. ROC analysis demonstrated excellent predictive performance for second-stage BTBV (AUC = 0.992) and baseline FHR (AUC = 0.914). Conclusion: Specific evolving CTG patterns effectively predicted fetal acidemia. Parameters from the second stage of labor were most predictive, underscoring the critical importance of continuous monitoring to identify high-risk cases and guide timely intervention for fetal hypoxia.
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