CoChat
Sign Up
Cited by 159Maternal and fetal healthcarePregnancy and preeclampsia studiesBlood transfusion and management

Third‐trimester transvaginal ultrasonography in placenta previa: does the shape of the lower placental edge predict clinical outcome?

Open access
Ghourab, S.·2001·Ultrasound in Obstetrics & Gynecology
DOI 10.1046/j.1469-0705.2001.00420.x
Open this paper in CoChat — free accountOpen PDF

Abstract

Objective: To evaluate the clinical significance of the shape of the lower placental edge in women with transvaginal sonographic diagnosis of placenta previa. Design: A prospective observational study at a tertiary teaching hospital. Population: A total of 104 women with confirmed transvaginal sonographic diagnosis of placenta previa before 32 weeks' gestation. Methods: Initial transvaginal sonography was performed at between 28 and 32 weeks' gestation in 138 patients with either strong clinical suspicion or previous abdominal sonographic diagnosis of placenta previa in the early third trimester. The lower placental edge was found to be positioned over the internal cervical os in 33 women (complete previa) and within 3 cm from it in 71 women (low‐lying placenta). Patients with low‐lying placenta were followed up by serial transvaginal sonographic examinations until delivery; detailed information including the placental location (anterior or posterior), the distance of its edge from the internal cervical os and its thickness were recorded. The clinical outcomes of the 17 who had a thick‐edge low‐lying placenta were compared with those who had a thin‐edge one (54 women). In patients with complete placenta previa, demographic data, the shape of the lower placental edge whenever transvaginal sonography visualized it, and the clinical outcomes were documented. The incidence of major complications in thick‐edge or central placenta was compared to that in the thin‐edge group. Results: Women having a low‐lying placenta with a thick edge had a significantly higher rate of antepartum hemorrhage (P = 0.0002), abdominal delivery (P = 0.02), abnormally adherent placenta (P = 0.012) and low birth weight (P = 0.006) than those in whom the placental edge was thin. Cesarean hysterectomy was required in six patients with complete placenta previa because of severe peripartum hemorrhage; all of them had either central or thick‐edge placenta accreta. Conclusion: Women with placenta previa are at a relatively higher risk of developing complications if the lower placental edge is thick. Integration of the shape of the lower placental edge into transvaginal sonographic assessment of placenta previa may improve the prediction of mode of delivery and clinical outcome. Copyright © 2001 International Society of Ultrasound in Obstetrics and Gynecology

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1046/j.1469-0705.2001.00420.x

Cites

19 of 19 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The additional ultrasound features (thicker edge, sponge-like echo, marginal sinus) are poorly defined and not routinely assessed in UK practice.

    “These additional ultrasound features are poorly defined, not routinely assessed in UK practice”

    From Placenta Praevia and Placenta Accreta: Diagnosis and Management: Green‐top Guideline No. 27a (2019) · cites this paper as [76]

    The Materials and Methods (page unavailable) explicitly defines a thick placental edge using measured thickness and angle, contrary to the claim that this feature is poorly defined. The paper does not address whether these features are routinely assessed in UK practice; searches for UK practice, sponge-like echo, and marginal sinus found no relevant passage. (LLM, conf=0.76)

    Checked by a reasoning model — may be wrong.

    Experimental — accuracy not yet measured

  • Women with a third trimester placental edge less than 20 mm from the internal os are more likely to need caesarean delivery when the placental edge is thicker (over 10 mm) and/or contains a sponge-like echo or marginal sinus.

    “Women presenting with a placental edge less than 20 mm from the internal os in the third trimester are more likely to need delivery by caesarean section when the placental edge is thicker (over 10 mm) 75,76 and/or contains a sponge-like echo 77 or marginal 'sinus'.78”

    From Placenta Praevia and Placenta Accreta: Diagnosis and Management: Green‐top Guideline No. 27a (2019) · cites this paper as [76]

    Citation 78 is attached to the marginal-sinus part of the sentence. The Methods and Results passages describe placental-edge thickness, vascularity and delivery outcomes, but searches for “marginal sinus” and “sinus” found no passage linking a marginal sinus to caesarean delivery. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. [12]12. Makie WC. Placenta previa. Clin Perinatol 1992; 19: 425 -35
  2. [15]15. Ancona S, Chatterjee M, Rhee I, Sicurenza B. The midtrimester placenta previa: prospective follow up. Eur J Radiol 1990; 10: 215 - 6
  3. [17]17. Nielson T, Hagberg H, Ljungblad U. Placenta previa and antepartum haemorrhage after previous caesarean section. Gynecol Obstet Invest 1989; 27: 88 -90

Cited by

Sorted by citations

Related

Authors
Ghourab, S.
Affiliations
King Saud University (SA)
Corresponding author
Ghourab, S.
ORCID
Ghourab, S.
Venue
Ultrasound in Obstetrics & Gynecology
Publisher
Wiley
Published
2001-08
Volume
18
Issue
2
Pages
103-108
ISSN
  • 0960-7692 (ISSN-L)
  • 1469-0705
DOI
10.1046/j.1469-0705.2001.00420.x
OpenAlex
W1974068772
Cited by
159
References
19
Citations by year
2026: 3 · 2025: 2 · 2024: 7 · 2023: 5 · 2022: 6 · 2021: 6 · 2020: 4 · 2019: 7 · 2018: 11 · 2017: 61 · 2016: 2 · 2015: 4 · 2014: 4 · 2013: 4 · 2012: 3
FWCI
2.00
Type
journal article
Language
en
Open access
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 498 d)
Locations
  • Ultrasound in Obstetrics and Gynecology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Maternal and fetal healthcare
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
  • Health Sciences › Medicine › Biochemistry › Blood transfusion and management
Keywords
placenta previa, transvaginal ultrasound, low-lying placenta, complete placenta previa, antepartum hemorrhage, mode of delivery, placenta accreta, cesarean hysterectomy, low birth weight, placental location
MeSH terms
Adult, Female, Humans, Placenta Previa, Predictive Value of Tests, Pregnancy, Pregnancy Trimester, Third, Prospective Studies, Ultrasonography, Prenatal, Endosonography

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review