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Citation: Qianwen ZHENG, Xiaoyan MA, Jihong LIU, Shanshan GUO, zhuoma ZHISHI. The Analysis between Uterocervical Angles and Cervical Length in Predicting Preterm Labor[J]. Journal of Kunming Medical University, 2023, 44(5): 132-137. doi: 10.12259/j.issn.2095-610X.S20230515

The Analysis between Uterocervical Angles and Cervical Length in Predicting Preterm Labor

doi: 10.12259/j.issn.2095-610X.S20230515
  • Received Date: 2023-01-28
  • Publish Date: 2023-05-25
  •   Objective   To study the value of the cervical length (CL) and uterocervical angles (involving anterior uterocervical angles and posterior uterocervical angles) in predicting preterm labor to find new predicting markers via transvaginal ultrasound (TVU) and provide new predicting thoughts.   Methods   A total of 252 pregnant women selected from 24 to 27+6 weeks of gestation underwent TVU to measure their CL, aUCA and pUCA, and finally were divided into the normal group and the premature group according their delivery time. The difference and value of above markers between the two groups were compared in predicting preterm.   Results   Among them, 236 gave birth at term, and 16 went into labor prematurely.There was a statistically significant difference in aUCA and pUCA between the two groups (P < 0.05), while there was no statistically significant difference in CL ( P > 0.05). By calculating the area under the ROC curve (AUC) of three cervical ultrasound indicators, only the AUC of aUCA was significantly greater than 0.5, with a threshold of 102.22°; The area under the ROC curve for predicting preterm birth using aUCA combined with CL was 0.715, and the threshold for the combined factor was -2.385.   Conclusion   The predictive value of premature delivery for CL in single live pregnant women aged 24-27+6 weeks is not good. Compared with CL, the measurement of aUCA through TVU is more effective in predicting preterm birth and when measuring aUCA ≥102.22°, the occurrence of premature birth should be highly vigilant. The joint variable combined aUCA and CL is recommended as the predicting marker for pregnant women with single fetus but without any symptom. the predicting value of CL and pUCA need to be studied further.
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