Observational studyArchives of gynecology and obstetrics2025
The prospective sonographic assessment of the lower uterine segment after cesarean section and its clinical utility.
Observational study in Archives of gynecology and obstetrics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Ultrasound-guided bladder localization for predicting abdominal adhesions, bladder injury, and scar healing in repeat cesarean sections: a prospective cohort study.International urology and nephrology · 2026Article
- Ultrasound Assessment Before Complex or Difficult Cesarean Section.Diagnostics (Basel, Switzerland) · 2026Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThis study aims to investigate the sonographic features of the lower uterine segment (LUS) and their association with successful vaginal birth after a cesarean section (VBAC).
methodsThis is a prospective observational cohort study of women who underwent a first cesarean section (CS). Inclusion criteria were age over 18 years and open family planning. Women with a history of any additional uterine surgery, as well as a vertical or inverted T uterotomy during the CS were excluded. A pregestational transvaginal sonography, followed by serial transabdominal ultrasound examinations at the first, second, and third trimesters upon starting a new pregnancy were performed. Each intra-gestational examination involved measuring the LUS on a sagittal plane over a length of 3 cm starting from the most inferior identifiable part of the myometrium behind a full bladder. Logistic regression was performed to test the association between measures of the LUS and successful vaginal birth after CS.
results96 women with a follow-up pregnancy within 2 years of the initial CS were included in the analysis. The pregestational RMT ratio was 62% and 38 (39%) women had a niche. The median thickness of the lower uterine segment was 8.34 mm (5.57-9.77), 4.75 mm (4.02-5.95), and 2.55 mm (2.01-3.55) at the first, second and third trimester, respectively. 70 women attempted VBAC and the risk of unplanned repeat CS was 37.1%. One millimeter increase in LUS thickness in the first trimester increased the odds of VBAC by 50-120% depending on the used measure (p < 0.05). This association weakened with increasing gestational age and the p values increased above 0.05.
conclusionThere is a good chance of successful VBAC for women attempting it. The sonographic assessment of the lower uterine segment during pregnancy could be helpful in counseling these women, albeit it seems that performing ultrasound during the first trimester is more informative than second and third trimesters.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.