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Aug 2, 2022 · Radiographic features. Ultrasound. First trimester. shows a twin pregnancy with a single gestational sac, and almost always two separate yolk sacs 9,10 (differentiating from an MCMA pregnancy) at 14-18 weeks, often a single placenta is seen: differentiating from a DCDA pregnancy. a thin inter-twin membrane may be seen.
- Joshua Yap
Nov 18, 2015 · In uncomplicated monochorionic twins, an ultrasound scan should be performed in the first trimester. There should then be scans every 2 weeks from 16 weeks onwards, as timely detection of TTTS and TAPS has been shown to improve perinatal outcome (Figure 3) 19, 20 (EVIDENCE LEVEL: 4).
- A. Khalil, M. Rodgers, A. Baschat, A. Bhide, E. Gratacos, K. Hecher, M. D. Kilby, L. Lewi, K. H. Nic...
- 421
- 2016
- 18 November 2015
Nov 7, 2019 · Twin pregnancies can be dichorionic or monochorionic (MC). MC twins account for 20% of twin pregnancies but 30% of all-cause pregnancy-related complications. This article describes the imaging findings that establish chorionicity and amnionicity. Ideally, these are established in the first trimester when accuracy is high, but they can also be ...
- Priyanka Jha, Tara A. Morgan, Anne Kennedy
- 2019
Jun 12, 2019 · Discordant sex signifies dichorionic, diamniotic (and dizygotic) twins ; Monochorionic T sign: Indicates monochorionic twins, with thin membrane and absence of thickening at membrane insertion site ; Note: A single placental mass does not rule out dichorionic twins ; Lambda or Delta Sign Indicating Dichorionic Twins
Aug 22, 2018 · In this review, we summarise the latest evidence relating to ultrasound surveillance of twin pregnancies including first trimester assessment and screening, growth surveillance and the detection and management of the complications of monochorionic pregnancies including twin-to-twin-transfusion syndrome, selective fetal growth restriction, twin r...
- R Townsend, A Khalil
- 10.1177/1742271X18794013
- 2018
- Ultrasound. 2018 Nov; 26(4): 193-205.
This guidance will address the role of ultrasound in the care of uncomplicated twin pregnancy and those complicated by TTTS, selective FGR (sFGR), twin anemia–polycythemia sequence (TAPS), twin reversed arterial perfusion (TRAP) sequence, conjoined twins and single intrauterine death (IUD).
Nov 16, 2016 · All women with a twin pregnancy should be offered an ultrasound examination between 11+0 weeks and 13+6 weeks of gestation (crown–rump length 45–84 mm) to assess fetal viability, gestational age and chorionicity, and to exclude major congenital malformations. Grade of recommendation: B.
