Reliability of transvaginal ultrasonography at 7–9 weeks' gestation in the determination of chorionicity and amnionicity in twin pregnancies

Bora, S. A.; Papageorghiou, Aris T.; Bottomley, C.; Kirk, E.; Bourne, Tom

doi:10.1002/uog.6133

Cited by 49 publications

(30 citation statements)

References 6 publications

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“…9,15,16 An early determination of chorionicity and amnionicity is therefore essential to optimize the management pathways in twin pregnancies. [17][18][19][20] The optimal window to determine chorionicity in twins with 98% accuracy is at 7-9 weeks of gestation. 18 Accuracy may be higher for DC twins than MC twins and is related to the gestational age at which the sonographic appearance of the amniotic sac develops.…”

Section: Zygosity Vs Chorionicitymentioning

confidence: 99%

“…[17][18][19][20] The optimal window to determine chorionicity in twins with 98% accuracy is at 7-9 weeks of gestation. 18 Accuracy may be higher for DC twins than MC twins and is related to the gestational age at which the sonographic appearance of the amniotic sac develops.…”

Section: Zygosity Vs Chorionicitymentioning

confidence: 99%

“…[17][18][19] Two distinct placental masses and different fetal gender indicate DC. When only 1 placental mass is visible on ultrasound, the presence of a lambda sign at the insertion of the intertwin membranes is an accurate predictor for DC whereas T sign is the most reliable indicator of MC ( Figure 1).…”

Section: Zygosity Vs Chorionicitymentioning

confidence: 99%

See 2 more Smart Citations

Anomalies of the placenta and umbilical cord in twin gestations

Hubinont¹,

Lewi

Bernard³

et al. 2015

American Journal of Obstetrics and Gynecology

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Section: Zygosity Vs Chorionicitymentioning

confidence: 99%

Section: Zygosity Vs Chorionicitymentioning

confidence: 99%

See 1 more Smart Citation

Anomalies of the placenta and umbilical cord in twin gestations

Hubinont¹,

Lewi

Bernard³

et al. 2015

American Journal of Obstetrics and Gynecology

View full text Add to dashboard Cite

“…The first trimester is an excellent time to determine the chorionicity and amnionicity of the fetuses. An appropriate time period for diagnosis of a multiple pregnancy is [27]. Determination of chorionicity is important for management of multiple gestations.…”

Section: Chorionicity Amnionicity and Fetal Numbermentioning

confidence: 99%

First trimester ultrasound: current approaches and practical pitfalls

Öztekin¹

2009

J Med Ultrasonics

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Revolutionary technological improvements and high-frequency transvaginal scanning have enabled the resolution of ultrasound imaging in the first trimester to increase such that detailed early fetal development can now be well visualized. This investment in imaging technology has enabled not only normal embryonic development but also chromosomal abnormalities and structural anomalies to be more easily and accurately diagnosed before the second trimester. This article is intended to help radiologists in the interpretation and clinical application of normal and abnormal first trimester ultrasound findings in early pregnancy. We review the current literature and applications and interpretations of first trimester ultrasound.

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“…Transvaginal ultrasound examination can be performed as early as after 7 weeks, menstrual age [Hill et al, 1996]. Transvaginal scan at 7-9 weeks' gestation shows very high agreement with the 11-to 14-week abdominal scan in the diagnosis of chorionicity and amnionicity in twin pregnancies [Bora et al, 2008].…”

Section: Monoamniotic/monochorionicmentioning

confidence: 93%

MFM/geneticist view on prenatal management of twins

O’Brien

2009

American J of Med Genetics Pt C

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Twin pregnancies are associated with an increase in both fetal and maternal morbidity and mortality. Health care supervision is complex, increasingly requiring care from maternal-fetal medicine specialists. This review discusses optimal twin prenatal management, which includes recognizing increased twin pregnancy risks specific to twin-types; counseling families regarding fetal complications, ranging from prematurity to cerebral palsy; screening for aneuploidy and open neural tube defects; specific twin guidelines for diagnostic testing, including chorionic villus sampling and amniocentesis; and monitoring for maternal complications.

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Reliability of transvaginal ultrasonography at 7–9 weeks' gestation in the determination of chorionicity and amnionicity in twin pregnancies

Abstract: Objectives To assess the agreement in the diagnosis of chorionicity and amnionicity between transvaginal ultrasound examination at 7-9 weeks' gestation and at the 11-14-week transabdominal scan. Methods

Cited by 49 publications

References 6 publications

Anomalies of the placenta and umbilical cord in twin gestations

Anomalies of the placenta and umbilical cord in twin gestations

First trimester ultrasound: current approaches and practical pitfalls

MFM/geneticist view on prenatal management of twins

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