360: Does first-trimester ultrasound predict obstetrical and neonatal outcomes in monochorionic diamniotic twin pregnancies?

2013 ◽  
Vol 208 (1) ◽  
pp. S159
Author(s):  
Baraa Allaf ◽  
Ali Ozhand ◽  
Sina Haeri ◽  
Joseph Wax ◽  
Anthony Vintzileos ◽  
...  
Keyword(s):  
First Trimester ◽  
Neonatal Outcomes ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound

When diamniotic twins suddenly become monoamniotic twins: spontaneous septostomy of the dividing membrane

2021 ◽  
Vol 14 (7) ◽  
pp. e243513
Author(s):  
Angela Vidal ◽  
Cristina Nastasia ◽  
Markus Hodel ◽  
Joachim Kohl
Keyword(s):  
Twin Pregnancy ◽  
Rare Condition ◽  
First Trimester ◽  
Sonographic Diagnosis ◽  
Sudden Failure ◽  
Reliable Diagnosis ◽  
Accepted Standard ◽  
Perinatal Management ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound

In twin pregnancies, amnionicity and chorionicity are crucial as they strongly determine prenatal and perinatal management. First trimester ultrasound allows a highly reliable diagnosis of amnionicity and chorionicity, making it an internationally accepted standard in antenatal care. However, in rare cases, amnionicity can change from diamniotic to monoamniotic throughout pregnancy, substantially impacting perinatal management. We report the case of a confirmed monochorionic diamniotic twin pregnancy with a diagnosis of spontaneous septostomy of the dividing membrane (SSDM) at 28 weeks of gestation, resulting in a pseudomonoamniotic pregnancy. Even though SSDM is a rare condition and its sonographic diagnosis might be challenging, it should be considered if, in a known diamniotic pregnancy, there is a sudden failure to visualise the intertwin membrane truly separating both twins.

OP11.02: Sensitivity of first trimester ultrasound in detecting fetal structural malformations in twin pregnancies

2014 ◽  
Vol 44 (S1) ◽  
pp. 93-93
Author(s):  
F. D'Antonio ◽  
M. Morlando ◽  
A. Khalil ◽  
A.T. Papageorghiou ◽  
B. Thilaganathan ◽  
...  
Keyword(s):  
First Trimester ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound

scholarly journals Sensitivity of first-trimester ultrasound in the detection of congenital anomalies in twin pregnancies: population study and systematic review

2016 ◽  
Vol 95 (12) ◽  
pp. 1359-1367 ◽  
Author(s):  
Francesco D'Antonio ◽  
Alessandra Familiari ◽  
Basky Thilaganathan ◽  
Aris T. Papageorghiou ◽  
Lamberto Manzoli ◽  
...  
Keyword(s):  
Systematic Review ◽  
Population Study ◽  
Congenital Anomalies ◽  
First Trimester ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound

First-Trimester Sonographic Prediction of Obstetric and Neonatal Outcomes in Monochorionic Diamniotic Twin Pregnancies

2014 ◽  
Vol 33 (1) ◽  
pp. 135-140 ◽  
Author(s):  
M. Baraa Allaf ◽  
Anthony M. Vintzileos ◽  
Martin R. Chavez ◽  
Joseph A. Wax ◽  
Samadh F. Ravangard ◽  
...  
Keyword(s):  
First Trimester ◽  
Neonatal Outcomes ◽  
Twin Pregnancies

Two Corpora Lutea Seen at 6–13 Weeks' Gestation Infers Dizygosity Among Spontaneous Same-Sexed Dichorionic Twins

2009 ◽  
Vol 12 (2) ◽  
pp. 180-182 ◽  
Author(s):  
Jean Woo ◽  
Stephen Tong ◽  
Megan J. Campbell ◽  
Leanne Wallace ◽  
Simon Meagher ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Corpus Luteum ◽  
Case Series ◽  
Monozygotic Twins ◽  
First Trimester ◽  
Corpora Lutea ◽  
Dna Genotyping ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound

AbstractCurrent ultrasound techniques can accurately determine the chorionicity of twins, but not zygosity. We previously proposed that the zygosity of spontaneously conceived twins can be determined at early ultrasound, where 2 corpora lutea infers dizygosity, and 1 implies monozygosity. Here we did a case series, comparing zygosity predicted using this method with definitive DNA genotyping of twins after birth. We retrospectively identified 14 ultrasound reports of spontaneous twin pregnancies at 6(+0 days) to 13+6 weeks' gestation, where both ovaries were seen and the number of corpora lutea documented. We visited all twin pairs, obtained buccal smears, and determined zygosity by genotyping 9 independent microsatellite markers. All 8 cases where 2 corpora lutea were seen were dizygotic pregnancies. One further case where 3 corpora lutea were seen was also dizygotic. All 3 sets of monozygotic twins had 1 corpus luteum. There were 2 cases incorrectly assigned, where 1 corpus luteum was seen in dizygotic pregnancies. We conclude if 2 corpora lutea are seen at a first trimester ultrasound of spontaneously conceived dichorionic twins, they appear to be almost certainly dizygotic. However, if 1 corpus luteum is seen in dichorionic twins, zygosity cannot be determined with certainty since it is either monozygotic, or dizygotic where a second corpus luteum has been missed.

Diagnosis of Placental Position by Early First-Trimester Ultrasound: A Pilot Study

2019 ◽  
Vol 26 (11) ◽  
pp. 1512-1518 ◽  
Author(s):  
Laura Detti ◽  
Jennifer C. Gordon ◽  
Mary E. Christiansen ◽  
Nicole A. Van de Velde ◽  
Ludwig Francillon ◽  
...  
Keyword(s):  
Pilot Study ◽  
Cesarean Section ◽  
Transvaginal Ultrasound ◽  
First Trimester ◽  
Significant Difference ◽  
Gestational Sac ◽  
Twin Pregnancies ◽  
Anterior Posterior ◽  
First Trimester Ultrasound

Objective: Conventional wisdom is that placental location cannot be identified before 8 weeks’ gestation when the placenta first becomes hyperechogenic on ultrasound. We sought to evaluate whether placental location could be reliably diagnosed between 5 and 6 weeks’ gestation. Materials and Methods: This was a retrospective analysis of prospectively acquired data. Early placental location was diagnosed by evaluation of the embryonal and yolk sac position inside the gestational sac on transvaginal ultrasound. Placental position was described as anterior, posterior, fundal, or lateral. Early and mid-pregnancy placental locations were compared and coded as being the same, having migrated to an adjacent surface, or being on an opposite surface. Results: A total of 111 patients met study criteria, providing 141 placental locations, comprising 85 singleton and reduced pregnancies and 28 dichorionic twin pregnancies. The most common placental location was anterior in both singleton and twin/triplet pregnancies. Placental location at the mid-pregnancy ultrasound was consistent with early pregnancy location in 100% of cases, with 79.5% (112/141) being on the same surface and 20.5% (29/141) having expanded onto an adjacent surface. Placental location was not associated with pregnancy outcome, although our study may have been underpowered to detect a significant difference. Conclusions: Placental location diagnosed at 5 to 6 weeks’ gestation is consistent with the location on mid-pregnancy ultrasound. Excluding the presence of an ectopic, cornual, or cesarean section scar and uterine subseptation pregnancy in early first trimester would allow a more effective tailoring of pregnancy follow-up.

scholarly journals Clinical Utility of Increased Nuchal Translucency at 11-13 weeks of Gestation in Twin Pregnancies based on the Chorionicity

2020 ◽  
Author(s):  
Siwon Lee ◽  
Hyun-Mi Lee ◽  
You Jung Han ◽  
Moon Young Kim ◽  
Hye Yeon Boo ◽  
...  
Keyword(s):  
Pregnancy Outcomes ◽  
Odds Ratio ◽  
First Trimester ◽  
Nuchal Translucency ◽  
Adverse Pregnancy ◽  
Twin Pregnancies ◽  
First Trimester Ultrasound ◽  
Fetal Karyotype ◽  
Increased Nuchal Translucency ◽  
Structural Anomalies

Objectives: To assess clinical implications of increased nuchal translucency (INT) in twin pregnancies based on the chorionicity. Methods: This was a retrospective review of the twin pregnancies who underwent first trimester ultrasound with nuchal translucency (NT) measurement at 11-13 weeks of gestation from January 2006 to December 2014. Data were collected using the OB database and the chart review. Pregnancy outcomes including gestational weeks at the delivery, abnormal fetal karyotypes, fetal structural anomalies, twin specific complications were analyzed. Results: A total of 1,622 twin pregnancies with INT≥95th percentile in one or both fetuses were identified. In all twin pregnancies with INT, abnormal fetal karyotypes were identified in 17 (8.6%) patients (odds ratio=13.28, CI=5.990-29.447, P=0.000) and twin-specific complications were identified in 23 (11.6%) patients (odds ratio=2.398, CI=1.463-3.928, P=0.001) compared to those with normal NT. Among the INT group, when the groups were subdivided into monochorionic (MC) and dichorionic (DC) pregnancies, 14.8% and 29.6% of the MC pregnancies had structural anomalies in one or both fetuses (odds ratio=5.774, 95% CI=1.445-23.071, P=0.01) and twin-specific complications (odds ratio=4.379, 95% CI=1.641-11.684, P=0.03), respectively, compared to DC pregnancies. The prevalence of abnormal fetal karyotypes was not statistically different in patients with INT when compared between MC and DC pregnancies (P=0.329). Conclusions: INT was associated with a higher rate of twin-specific complications and fetal structural anomalies in MC twin pregnancies rather than abnormal fetal karyotype. Therefore, NT measurement in MC twin pregnancies can be a useful tool for prediction of adverse pregnancy outcomes. Appropriate counseling and surveillance based on the chorionicity is imperative in prenatal care of twin pregnancies.

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