Evidence map›Paper›PMID 41699431›Full record

Observational studyBJOG : an international journal of obstetrics and gynaecology2026

Clinical Characteristics Associated With Very Preterm Delivery Despite Transabdominal Cerclage: A Cohort Study.

Laura van der Krogt, Lisa Story, Natalie Suff, Andrew Shennan

Abstract readObservational Study
In one paragraph

Observational study in BJOG : an international journal of obstetrics and gynaecology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Laura van der KrogtDivision of Women's Health, King's College London, St Thomas' Hospital, London, UK.ORCID https://orcid.org/0009-0004-2040-0375
Lisa StoryDivision of Women's Health, King's College London, St Thomas' Hospital, London, UK.ORCID https://orcid.org/0000-0001-9328-9592
Natalie SuffDivision of Women's Health, King's College London, St Thomas' Hospital, London, UK.
Andrew ShennanDivision of Women's Health, King's College London, St Thomas' Hospital, London, UK.

Funding

Action Medical Research
6 · The paper itself

Abstract

objectiveTo identify factors associated with unsuccessful transabdominal cerclage (TAC) insertion, defined as delivery before 32 weeks, including maternal demographics, preterm birth risk factors, operative details (laparoscopic or open, pre-pregnancy or during pregnancy) and subsequent cervical length.

designObservational cohort study.

settingA tertiary-level London hospital. SAMPLE: Women who underwent TAC between 2011 and 2024 and consented to inclusion in the Preterm Clinical Network (PCN) Database.

methodsData were collected from the PCN database and maternity records.

main outcome measuresCharacteristics of women delivering before versus after 32 weeks were compared using student's t-test where data were continuous and chi-squared where data were categorical (SPSS version 29.0).

resultsAmong 125 pregnancies following TAC, eight (6.4%) delivered before 32 weeks. Previous trachelectomy was strongly associated with preterm delivery (p < 0.0001). Mean cervical length differed significantly between groups: first trimester (19.3 mm vs. 33.8 mm, p < 0.001) and second trimester (18.8 mm vs. 31.9 mm, p < 0.001). Of 30 women with prior pregnancies using the same TAC, 80% (24/30) achieved at least one term birth and 13.3% (4/30) had two or more term deliveries.

conclusionTAC is highly effective, with over 90% of women delivering beyond 32 weeks. Factors linked to unsuccessful TAC include prior trachelectomy and short cervical length in early pregnancy. Effectiveness persists across subsequent pregnancies, with many women achieving multiple term births using the same TAC.

Indexed as

Cerclage, CervicalPremature BirthUterine Cervical IncompetenceAdultCervical Length MeasurementCohort StudiesFemaleGestational AgeHumansLondonPregnancyRisk FactorsTrachelectomycerclage failurecervical lengthclinical researchpreterm birthpreterm labourtransabdominal cerclage

Identifiers

PMID41699431
PMCPMC13253993

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

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.