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The comparison of predictive value of cervical length in singleton spontaneous preterm labor with in vitro fertilization pregnancies: A cohort study
BACKGROUND: Preterm labor (PTL) is one of the most important factors in neonatal mortality. Some studies have revealed a reverse relationship between cervical length (CL) and PTL, however, further evidence is needed to confirm it. OBJECTIVE: To investigate the predictive value of CL in spontaneous a...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Knowledge E
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7851474/ https://www.ncbi.nlm.nih.gov/pubmed/33554003 http://dx.doi.org/10.18502/ijrm.v19i1.8180 |
Sumario: | BACKGROUND: Preterm labor (PTL) is one of the most important factors in neonatal mortality. Some studies have revealed a reverse relationship between cervical length (CL) and PTL, however, further evidence is needed to confirm it. OBJECTIVE: To investigate the predictive value of CL in spontaneous and in vitro fertilization (IVF) pregnancies. MATERIALS AND METHODS: This prospective cohort study was performed on 154 pregnant women from 16-26 wk of gestation with singleton fetus in spontaneous delivery (n = 77) and IVF pregnancies (n = 77) and followed up until delivery. Women with multiple pregnancy, placenta previa, cerclage, and congenital anomalies were excluded from study. The cut-off determination was done according to the Roc analysis. RESULTS: The mean CL in term delivery and PTL groups were 37 [Formula: see text] 7 mm and 31 [Formula: see text] 6 mm, respectively (p [Formula: see text] 0.001). The frequency of PTL in spontaneous and IVF pregnancies were 7.8% and 23.27%, respectively (p = 0.007). According to the Roc analysis, the best cut-off for normal pregnancy was [Formula: see text] 36 mm with the negative predictive value of 97.9%, the positive predictive value of 11.4%, sensitivity 83.3%, and specificity of 46.5%. While for the IVF group, the cut off was [Formula: see text] 30 mm, with a negative predictive value of 88.4%, positive predictive value of 57.8%, sensitivity of 63.2%, and specificity of 86%. CONCLUSION: In this study, IVF had a significant direct correlation with PTL. CL also had a significant indirect relationship with PTL. |
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