Monochorionic Twin Placenta
Monochorionic Twin Placenta - Related Videos
09:04
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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2011
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
09:52
Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
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Cited by 92 •
2011
Twin-to-twin transfusion syndrome and twin anemia polycythemia sequence are two potentially devastating problems in perinatal medicine. Both disorders occur only in monochorionic twins and result from unbalanced blood flow through placental vascular anastomoses. We provide a simple protocol to accurately evaluate the presence of vascular anastomoses using colored dye injection of placental vessels after birth.
09:51
Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
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Cited by 9 •
2018
Practicing the specific skills required for fetoscopic laser coagulation of monochorionic placental anastomoses on realistic models can aid less experienced surgeons in overcoming the steep learning curve associated with this procedure that is now regarded as the standard of care for twin-twin transfusion syndrome.
14:42
Isolation and Analysis of Hematopoietic Stem Cells from the Placenta
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Cited by 11 •
2008
We have identified the placenta as a major hematopoietic organ during development. We found that hematopoietic stem cells (HSCs) are both generated and expanded in the placenta in unique microenvironmental niches. Here, we describe experimental techniques required for isolation and visualization of HSCs in the mouse placenta.
06:30
Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
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Cited by 2 •
2017
Here, we present a protocol for a mosaic labeling technique that permits the visualization of neurons derived from a common progenitor cell in two distinct colors. This facilitates neural lineage analysis with the capability of birth-dating individual neurons and studying gene function in the same neurons of different individuals.
FAQs
Vascular connections can allow blood to pass between the twins through their shared placental circulation. If that exchange becomes unequal, one twin may receive less blood while the other receives more, creating an imbalance that can affect fetal well-being. This mechanism explains why circulation requires particular attention during assessment of monochorionic twin pregnancies.
Unequal flow through the shared circulation may contribute to twin-to-twin transfusion syndrome, twin anemia-polycythemia sequence, or selective fetal growth restriction. These conditions reflect different consequences of an imbalanced placental blood supply. Recognizing the shared-circulation risk helps clinicians interpret the pregnancy as requiring focused surveillance rather than routine risk assessment alone.
Its clinical importance comes from the possibility that shared placental circulation may produce unequal blood flow between the twins. Even when no complication has yet been identified, this possibility supports proactive risk assessment and closer follow-up. In medicine, recognizing the placental arrangement therefore helps guide surveillance before problems become clinically apparent.
Prenatal imaging is used to identify whether the twins are supported by a shared chorionic placenta. Establishing monochorionicity is an important assessment step because it reveals the possibility of vascular connections and unequal intertwin blood flow. The imaging finding then provides the basis for determining the intensity of subsequent ultrasound surveillance and risk evaluation.
Identification leads to closer ultrasound surveillance than would be appropriate if the shared placental circulation were not a concern. Repeated assessment is used to support risk evaluation for complications related to unequal blood flow, including twin-to-twin transfusion syndrome, twin anemia-polycythemia sequence, and selective fetal growth restriction.
The finding connects prenatal imaging with a more focused management plan. Clinicians can use the recognized risk of shared-circulation complications to intensify surveillance, assess evolving risk, and consider timely clinical management when concerns arise. Its value is therefore not only diagnostic; it helps organize care around the potential effects of unequal blood flow.