Clinical Report: Enhancing Mid-Trimester Prediction of Spontaneous Preterm Birth

Overview

This study evaluates the predictive value of cervical strain elastography parameters, combined with cervical length, for spontaneous preterm birth (sPTB) in asymptomatic women. Results indicate that incorporating elastography significantly improves predictive accuracy compared to cervical length alone.

Background

Spontaneous preterm birth (sPTB) is a major contributor to neonatal morbidity and mortality, affecting millions of newborns globally. Current screening methods, primarily cervical length (CL) measurement, have limited predictive accuracy, necessitating the exploration of additional techniques such as cervical strain elastography to enhance risk stratification.

Data Highlights

Key Findings

• sPTB occurred in 13.5% of the studied cohort (37 of 275 women).
• IOS demonstrated the highest discrimination for sPTB with an AUC of 0.797.
• The combined model of CL and IOS/EOS achieved an AUC of 0.828, outperforming both CL alone and IOS/EOS alone.
• The optimal cut-off for the combined model yielded a sensitivity of 73% and specificity of 82%.
• Decision curve analysis indicated superior net benefit for the combined model across relevant threshold probabilities.

Clinical Implications

The findings suggest that mid-trimester cervical strain elastography can enhance the predictive accuracy for sPTB when used alongside cervical length measurements. Clinicians may consider integrating this approach into routine assessments to better stratify risk and manage pregnancies at risk for preterm birth.

Conclusion

Cervical strain elastography, particularly the IOS-related metrics, offers valuable predictive information for sPTB. Further validation is necessary before its routine clinical implementation.

Related Resources & Content

1. BMC Pregnancy and Childbirth, 2026 -- Risk factors for preterm birth and prolonged pregnancy following cervical cerclage in women with cervical insufficiency: a retrospective analysis and predictive model
2. BMC Pregnancy and Childbirth, 2026 -- Value of serial transperineal ultrasound measurements of cervical length in predicting gestational age at preterm birth in women with twin pregnancies: a retrospective cohort study
3. Society for Maternal Fetal Medicine Consult Series #70: Management of short cervix in individuals without a history of spontaneous preterm birth - SMFM Publications and Clinical Guidelines
4. Updated Clinical Guidance for the Use of Progestogen Supplementation for the Prevention of Recurrent Preterm Birth | ACOG
5. Pediatric Cardiology — Impact of Temporal and Spatial Smoothing on Strain Measurements Derived from Speckle Tracking in Neonatal Patients
6. Archives of Gynecology and Obstetrics — Pregnancy outcomes after ultrasound- and physical examination-indicated cervical cerclage: a retrospective cohort study
7. Cervical Elastography as a Predictive Tool for Preterm Birth: A Systematic Review and Meta-analysis
8. Frontiers | Cervical strain elastography improves mid-trimester prediction of spontaneous preterm birth beyond cervical length: a single-center cohort study
9. Society for Maternal Fetal Medicine Consult Series #70: Management of short cervix in individuals without a history of spontaneous preterm birth - SMFM Publications and Clinical Guidelines
10. Updated Clinical Guidance for the Use of Progestogen Supplementation for the Prevention of Recurrent Preterm Birth | ACOG
11. Recommendations for strain elastography of the uterine cervix - PMC
12. Cervical elastography at 18 to 23 weeks to predict spontaneous preterm birth in individuals with a history of preterm birth - PMC
13. Diagnostic Efficacy of Cervical Elastography in Predicting Spontaneous Preterm Birth in Pregnancies with Threatened Preterm Labor - PubMed
14. Assessment of Gravid Cervix