Determination of gestational age in twin pregnancy: Which fetal crown–rump length should be used?

Chaudhuri, K.; Su, Linlin; Wong, P. C.; Chan, Yiong‐Huak; Choolani, Mahesh; Chia, D.; Biswas, Arijit

doi:10.1111/j.1447-0756.2012.02054.x

Cited by 17 publications

(7 citation statements)

References 16 publications

(26 reference statements)

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“…Other studies have recommended the use of the smaller CRL or the mean CRL, which takes into account both fetuses. The disadvantage of using the smaller CRL is the potential of the operator believing that the larger twin is large‐for‐gestational age, and therefore being falsely reassured that the smaller twin is still growing appropriately.…”

Section: Recommendationsmentioning

confidence: 99%

ISUOG Practice Guidelines: role of ultrasound in twin pregnancy

Khalil¹,

Rodgers²,

Baschat³

et al. 2016

Ultrasound Obstet Gynecol

517

613

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Section: Recommendationsmentioning

confidence: 99%

ISUOG Practice Guidelines: role of ultrasound in twin pregnancy

Khalil¹,

Rodgers²,

Baschat³

et al. 2016

Ultrasound Obstet Gynecol

517

613

View full text Add to dashboard Cite

“…Studies on twin gestations conceived by assisted reproduction have demonstrated that the smaller CRL is a more accurate estimate of the true gestational age in twins, specifically when there is less than 95% discrepancy in CRL. 5,6 Other studies suggest that accurate dating can be obtained by averaging the gestational age of each fetus. 7 However, most experts agree that dating in a twin pregnancy should be based on the larger fetus to avoid missing early intrauterine growth restriction of the cotwin.…”

Section: Determining Gestational Agementioning

confidence: 98%

First-trimester Ultrasound and Aneuploidy Screening in Multifetal Pregnancies

Hirshberg

Dugoff

2015

Clinical Obstetrics &Amp; Gynecology

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First-trimester ultrasound provides valuable information to help optimize the management of multifetal pregnancies. First trimester ultrasound the use of ultrasound and screening for aneuploidy has been well studied in singleton pregnancies. While evidence supporting the use of ultrasound in multiple gestations is well established, aneuploidy screening continues to evolve and its role in the prenatal setting has been less well studied. We review the importance of early first trimester ultrasound in assessing gestational age and chorionicity and early identification of anomalies, and review the various methods and limitations of aneuploidy screening and invasive diagnostic procedures in multiples.

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“…Twin pregnancies are dated according to the crown–rump length (CRL) measurement in the larger twin at the 11 + 0 to 13 + 6‐week scan 11 . Some studies suggested that the CRL of the smaller twin may be more accurate 115 but, as this can give false reassurance that the smaller twin is growing appropriately, leading to a missed diagnosis of aneuploidy or sFGR, this method is not commonly used in practice.…”

Section: Timing Of Birth In Uncomplicated Twin Pregnancymentioning

confidence: 99%

Controversies in the management of twin pregnancy

Khalil

Liu

2021

Ultrasound in Obstet & Gyne

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Despite many advances in antenatal care, twin pregnancies still experience more adverse outcomes, in particular higher perinatal mortality and morbidity. They also pose a multitude of challenges and controversies as outlined in this paper. Moreover, they are less likely to be included in clinical trials. Many issues on classification and management remain under debate. Efforts on standardising diagnostic criteria, monitoring protocols, management and outcome reporting are likely to reduce their perinatal risks. The top 10 most important research uncertainties related to multiple pregnancies have been identified by both clinicians and patients. More robust research in the form of randomised trials and large well-conducted prospective cohort studies are needed to address these controversies.

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Determination of gestational age in twin pregnancy: Which fetal crown–rump length should be used?

Abstract: The smaller CRL is more accurate in the estimation of the GA for twin pregnancy compared to the larger or mean CRL values.

Cited by 17 publications

References 16 publications

ISUOG Practice Guidelines: role of ultrasound in twin pregnancy

ISUOG Practice Guidelines: role of ultrasound in twin pregnancy

First-trimester Ultrasound and Aneuploidy Screening in Multifetal Pregnancies

Controversies in the management of twin pregnancy

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