Fetal intervention for complications of monochorionic twinning
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Updated: Sep 27, 2026
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
Published on: September 5, 2011
Diana L Farmer1, Shinjiro Hirose
1The Fetal Treatment Center, Department of Surgery, Division of Pediatric Surgery, University of California, San Francisco, 513 Parnassus Avenue, Room HSW 1601, San Francisco, California 94143-4086, USA.
Abstract:
All multiple gestation pregnancies have a significantly higher risk of fetal morbidity and mortality than singleton pregnancies. The risks become progressively greater as the number of fetuses increases. Among twin pregnancies, there is a greater danger of an adverse outcome when the twins share a single placenta (monochorionic), than if each has a separate placenta (dichorionic). A still greater danger exists when monochorionic twins also share a single amniotic sac. Fetal surgical interventions now exist to treat many of the complications associated with twin gestation pregnancies.
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