scholarly journals First-trimester ultrasound determination of chorionicity in twin pregnancy

2011 ◽  
Vol 38 (5) ◽  
pp. 530-532 ◽  
Author(s):  
T. Dias ◽  
T. Arcangeli ◽  
A. Bhide ◽  
R. Napolitano ◽  
S. Mahsud-Dornan ◽  
...  
Keyword(s):  
Twin Pregnancy ◽  
First Trimester ◽  
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.

First-trimester ultrasound dating of twin pregnancy: are singleton charts reliable?

2010 ◽  
Vol 117 (8) ◽  
pp. 979-984 ◽  
Author(s):  
T Dias ◽  
S Mahsud-Dornan ◽  
B Thilaganathan ◽  
A Papageorghiou ◽  
A Bhide
Keyword(s):  
Twin Pregnancy ◽  
First Trimester ◽  
First Trimester Ultrasound

Changes in the Ultrasonographical Appearance of Intertwin-Dividing Membrane of Monochorionic Diamniotic Twin Pregnancy

2021 ◽  
pp. 1-3
Author(s):  
Eri Soga ◽  
Takeshi Murakoshi ◽  
Shuhei Terada ◽  
Hiroko Konno
Keyword(s):  
Twin Pregnancy ◽  
Ultrasound Image ◽  
First Trimester ◽  
High Accuracy ◽  
Healthy Male ◽  
Emergency Cesarean ◽  
Ultrasound Findings ◽  
Chorionic Membrane ◽  
Amniotic Membranes

Abstract Ultrasound determination of chorionicity in the first trimester has a high accuracy, but it is associated with some pitfalls. This report presents changes in ultrasound findings during a monochorionic pregnancy with chorionic membrane folding (CMF). The patient was a 32-year-old woman, gravida 2 para 0. Her transvaginal ultrasonography identified two gestational sacs (GSs) and two embryos at 7 weeks of gestation. At 9 weeks’ gestation, an ultrasound image showed a lambda sign at both sides and the interruption of chorionic membranes, resulting in the diagnosis of a monochorionic diamniotic (MCDA) twin pregnancy with CMF. At 11 weeks’ gestation, an ultrasound image showed a lambda sign at one portion of the septum and a T sign at another portion. This change suggested that the folded chorionic membrane had partially flattened. At 35 weeks’ gestation, an emergency cesarean section was performed. Two healthy male neonates were delivered. Histological placental examination confirmed that the intertwin membrane was composed of two amniotic membranes without a folded chorionic membrane, confirming the diagnosis of a MCDA twin pregnancy. This case presents two important ultrasound chorionicity findings: a monochorionic pregnancy with CMF can show two GSs and a lambda sign and the CMF can flatten or change during the pregnancy.

Monochorionic Monozygotic Twin Pregnancy Complicated with Twin-Twin Transfusion Syndrome Presenting with an Obvious Lambda Sign in the First Trimester

2015 ◽  
Vol 37 (2) ◽  
pp. 154-156 ◽  
Author(s):  
Akiko Yamashita ◽  
Keisuke Ishii ◽  
Nobuhiro Hidaka ◽  
Naoto Yonetani ◽  
Shusaku Hayashi ◽  
...  
Keyword(s):  
Twin Pregnancy ◽  
Dna Typing ◽  
First Trimester ◽  
Monozygotic Twin ◽  
Ultrasound Evaluation ◽  
First Trimester Ultrasound

In this report, we present a case of twin-twin transfusion syndrome in the presence of the thick dividing wall of each sac in dichorionic twins. The dichorionic diagnosis was based on the presence of the lambda sign at the first-trimester ultrasound evaluation. In addition to fetoscopic and pathological investigation, DNA typing confirmed that the twin set was monochorionic and monozygotic. This case illustrates that although extremely uncommon, the presence of lambda sign does not exclude monochorionic pregnancy.

FRACTIONAL DETERMINATIONS OF URINARY 17-KETOSTEROIDS IN HYPEREMESIS GRAVIDARUM

1962 ◽  
Vol 41 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Pentti A. Järvinen ◽  
Sykkö Pesonen ◽  
Pirkko Väänänen
Keyword(s):  
Hyperemesis Gravidarum ◽  
First Trimester ◽  
Control Group ◽  
Before And After ◽  
Daily Urine ◽  
First Trimester Of Pregnancy ◽  
The Difference

ABSTRACT The fractional determination of 17-ketosteroids in the daily urine was performed in nine cases of hyperemesis gravidarum and in four control cases, in the first trimester of pregnancy both before and after corticotrophin administration. The excretion of total 17-KS is similar in the two groups. Only in the hyperemesis group does the excretion of total 17-KS increase significantly after corticotrophin administration. The fractional determination reveals no difference between the two groups of patients with regard to the values of the fractions U (unidentified 17-KS), A (androsterone) and Rest (11-oxygenated 17-KS). The excretion of dehydroepiandrosterone is significantly higher in the hyperemesis group than in the control group. The excretion of androstanolone seems to be lower in the hyperemesis group than in the control group, but the difference is not statistically significant. The differences in the correlation between dehydroepiandrosterone and androstanolone in the two groups is significant. The high excretion of dehydroepiandrosterone and low excretion of androstanolone in cases of hyperemesis gravidarum is a sign of adrenal dysfunction.

Crown–rump length measurement: a new age for first‐trimester ultrasound?

2021 ◽  
Author(s):  
J. Stirnemann ◽  
M. Massoud ◽  
N. Fries ◽  
C. Dumont ◽  
G. Haddad ◽  
...  
Keyword(s):  
First Trimester ◽  
New Age ◽  
Length Measurement ◽  
Crown Rump Length ◽  
First Trimester Ultrasound
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