Definition of "monochorionic" []

• Sharing one foetal membrane, or chorion. Typically used of identical twins. (adjective)

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• "There is a higher complication rate in monochorionic (shared placenta) twin gestations as a result of the placental connections between the twins."
• "Fetoscopic umbilical cord cauterization to prevent neurologic injury in monochorionic twins"
• "Given that intrauterine death of one fetus in monochorionic twin pregnancies is associated with a 50-percent loss of the other twin, or a 40 to 60 percent incidence of significant neurologic injury if the other twin survives the death of its co-twin, the risks to the donor twin in this case for death or neurologic injury were high."