The DOI matches its Crossref record.
The lambda sign at 10–14 weeks of gestation as a predictor of chorionicity in twin pregnancies
Abstract
Chorionicity was prospectively determined in 369 twin pregnancies by ultrasound at 10–14 weeks of gestation. Pregnancies were classified as monochorionic if there was a single placental mass in the absence of the lambda sign at the inter‐twin membrane‐placental junction, and dichorionic if there was a single placental mass but the lambda sign was present, or the placentas were not adjacent to each other. In 81 (22%) cases, the pregnancies were classified as monochorionic and in 288 (78%) as dichorionic. Pregnancy outcome was available in 279 cases and all 63 of these pregnancies classified as monochorionic resulted in the delivery of same‐sex twins. Similarly, all 100 different‐sex pairs were correctly classified as dichorionic. These findings demonstrate the high reliability of ultrasound examination at 10–14 weeks of gestation in determining chorionicity in twin pregnancies. Copyright © 1996 International Society of Ultrasound in Obstetrics and Gynecology
Overview
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.
Integrity signals
Registry
Cites
Statistics
Verification
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.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Snijders, R., Noble, P., Sebire, N., Souka, A., & Nicolaides, K. (1998) · The Lancet · doi:10.1016/s0140-6736(97)11280-6 · Cited by 1,572
The hidden mortality of monochorionic twin pregnancies
Sebire, N. J., Snijders, R. J. M., Hughes, K., Sepulveda, W., & Nicolaides, K. H. (1997) · BJOG: An International Journal of Obstetrics & Gynaecology · doi:10.1111/j.1471-0528.1997.tb10948.x · Cited by 630
Self-citationNuchal translucency and other first-trimester sonographic markers of chromosomal abnormalities
Nicolaides, K. H. (2004) · American Journal of Obstetrics and Gynecology · doi:10.1016/j.ajog.2004.03.090 · Cited by 626
Self-citationSyngelaki, A., Hammami, A., Bower, S., Zidere, V., Akolekar, R., & Nicolaides, K. H. (2019) · Ultrasound in Obstetrics & Gynecology · doi:10.1002/uog.20844 · Cited by 350
Self-citationFirst‐trimester ultrasound determination of chorionicity in twin pregnancy
Dias, T., Arcangeli, T., Bhide, A., Napolitano, R., Mahsud‐Dornan, S., & Thilaganathan, B. (2011) · Ultrasound in Obstetrics & Gynecology · doi:10.1002/uog.8956 · Cited by 127
Metadata
- Authors
- Sepulveda, W., Sebire, N. J., Hughes, K., Odibo, A., & Nicolaides, K. H.
- Venue
- Ultrasound in Obstetrics & Gynecology
- Publisher
- Wiley
- Published
- 1996-06
- Volume
- 7
- Issue
- 6
- Pages
- 421-423
- ISSN
- 0960-7692 (ISSN-L)
- 1469-0705
- OpenAlex
- W1991025169
- Cited by
- 360
- References
- 0
- FWCI
- 11.74
- Type
- journal article
- Language
- en
- Open access
- closed
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
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: The lambda sign at 10–14 weeks of gestation as a predictor of chorionicity in twin pregnancies. https://app.cochat.ai/papers/10.1046/j.1469-0705.1996.07060421.x
- The paper
- Sepulveda, W., Sebire, N. J., Hughes, K., Odibo, A., & Nicolaides, K. H. (1996). The lambda sign at 10–14 weeks of gestation as a predictor of chorionicity in twin pregnancies. Ultrasound in Obstetrics & Gynecology. https://doi.org/10.1046/j.1469-0705.1996.07060421.x
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
