Journal
FETAL DIAGNOSIS AND THERAPY
Volume 48, Issue 1, Pages 24-27Publisher
KARGER
DOI: 10.1159/000510636
Keywords
Monochorionic twins; Twin-twin transfusion syndrome; Fetoscopic laser photocoagulation; Intertwin anastomosis
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The study found that the prevalence of extraplacental anastomoses (EPA) in monochorionic diamniotic (MCDA) twin pregnancies is approximately 5%, with a significant association with velamentous cord insertion of both twins.
Objectives: To evaluate the prevalence of extraplacental anastomoses (EPA) and the factors associated. Methods: A retrospective study including 144 placentas from monochorionic diamniotic (MCDA) twins delivering at one institution was performed. EPA were defined as any intertwin anastomosis located outside the chorionic plate on macroscopic inspection. The association with perinatal factors and with umbilical cord insertion site was analyzed. Results: The prevalence of EPA was 4.9% (7/144). Velamentous cord insertion of both twins was significantly associated with the presence of EPA in the multivariate logistic regression model (p = 0.045). Discussion: EPA was found in approximate to 5% of MCDA twin pregnancies.
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