Associations of temporal changes in cervical length and lower uterine segment length with spontaneous preterm delivery risk: a prospective study of 727 Japanese women

Purpose A prospective assessment of the risk of spontaneous preterm delivery (sPTD) by evaluating temporal changes in cervical measurements. Methods We analyzed clinical variables, focusing on cervical length (CL) and lower uterine segment (LUS) length (LUSL) as measured by transvaginal ultrasonogra...

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Bibliographic Details
Published in:Journal of medical ultrasonics (2001) 2019-04, Vol.46 (2), p.201-207
Main Authors: Oi, Rie, Miyasaka, Naoyuki, Yamashita, Takahiro, Adachi, Tomoko
Format: Article
Language:English
Subjects:
Body mass index
Cervix
Imaging
Medical research
Medicine
Medicine & Public Health
Original Article
Pregnancy
Pregnant women
Premature birth
Radiology
Regression analysis
Risk assessment
Segments
Ultrasound
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Summary:Purpose A prospective assessment of the risk of spontaneous preterm delivery (sPTD) by evaluating temporal changes in cervical measurements. Methods We analyzed clinical variables, focusing on cervical length (CL) and lower uterine segment (LUS) length (LUSL) as measured by transvaginal ultrasonography in 727 pregnant Japanese women. Results In women undergoing term deliveries, CL increased from gestational week (GW) 8–25. In contrast, the combination of CL and LUSL (ComL for “combined length”) gradually decreased and sole LUSL became almost 0 mm by GW 25. Univariate logistic regression analysis suggested that a history of PTD was a risk factor for sPTD. CL, LUSL, and ComL were not significant predictors of sPTD. Conclusion To assess the risk of sPTD in the second trimester, it is not necessary to distinguish the cervix from the LUS.
ISSN:1346-4523
1613-2254
DOI:10.1007/s10396-018-0919-5