Chorionicity determination: lambda sign on 3D scan

This video clip illustrates the difference between dichorionic diamniotic (DCDA) and monochorionic diamniotic (MCDA) intertwine membranes. The correct diagnosis of chorionicity is crucial for the management of twins and other multiple gestations. This training video uses dichorionic triamniotic (DCTA) triplet pregnancy as an example of multiple pregnancy placentation types. In dichorionic diamniotic (DCDA) twins the inter-twin membrane is composed of a central layer of chorionic tissue sandwiched between t