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- W2206543256 abstract "Objective Twin-twin transfusion syndrome complicates up to 15% of monochorionic diamniotic gestations. Current recommendations for sonographic surveillance in monochorionic diamniotic pregnancies for detection of twin-twin transfusion syndrome vary. Our objective was to determine an appropriate frequency of sonographic surveillance to optimize detection of twin-twin transfusion syndrome in monochorionic diamniotic gestations. Methods A retrospective cohort analysis of all nonanomalous monochorionic diamniotic twins delivered at the University of North Carolina over a 9-year period was performed. The rate and gestational age of twin-twin transfusion syndrome onset were calculated. The time to the diagnosis of twin-twin transfusion syndrome was evaluated by a Kaplan-Meier survival curve; clinical factors at initial sonography were examined for their use in prediction of twin-twin transfusion syndrome. Results Of the 577 twin deliveries, 145 (25%) were monochorionic diamniotic and included for analysis. The rate of twin-twin transfusion syndrome was 17.93% (n = 26). The mean frequency of surveillance ± SD before diagnosis of twin-twin transfusion syndrome was 3.1 ± 2.1 weeks. The mean gestational age at diagnosis of twin-twin transfusion syndrome was 21.3 ± 3.4 weeks (range, 15–29 weeks). Both a discordant maximum vertical amniotic fluid pocket (>65% difference) and a discordant estimated fetal weight (>25% difference) at initial sonography showed a significantly shorter time to diagnosis of twin-twin transfusion syndrome (P < .0001). Conclusions Evaluation for twin-twin transfusion syndrome should begin in the second trimester. Weekly surveillance for those pregnancies with estimated fetal weight or maximum vertical pocket discordance is recommended. For those with a concordant estimated fetal weight and maximum vertical pocket, sonographic evaluation every 2 weeks is warranted to 28 to 30 weeks. After that, development of twin-twin transfusion syndrome is less likely, and a different paradigm of antenatal testing may be reasonable." @default.
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- W2206543256 date "2011-03-01" @default.
- W2206543256 modified "2023-09-25" @default.
- W2206543256 title "Monochorionic Diamniotic Twin Pregnancy" @default.
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- W2206543256 doi "https://doi.org/10.7863/jum.2011.30.3.297" @default.
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