If one twin demises in dichorionic twins, what is the risk of death for the surviving twin?

In cases of dichorionic twins, if one twin dies, the risk of death for the surviving twin is approximately 3%. This relatively low risk can be attributed to the separate placentas and chorionic membranes in dichorionic twins, which provide a level of protection for the surviving twin. The placentation type helps somewhat mitigate the complications associated with the demise of one twin, unlike in monochorionic twins where the risks are significantly higher due to shared vascular connections.

This statistic emphasizes the distinctive nature of twin pregnancies based on chorionicity, underscoring the importance of careful monitoring and management in multiple gestations. Understanding these risks can help guide clinical decisions and reassure parents about the viability of the surviving twin after a twin's demise.