FISDAP OB-GYN Practice Test 2026 – Comprehensive All-in-One Guide to Excelling in Your Certification!

During the delivery of twins, it is typical to encounter two placentas, especially if the twins are fraternal (dizygotic) and develop from two separate eggs. Each twin would generally have its own placenta, providing individual blood supplies and nutrients necessary for their development. This separation can also reduce the risk of complications associated with shared placentas, such as twin-to-twin transfusion syndrome.

In cases of identical twins (monozygotic), there might be one placenta shared between them, but this varies depending on how the embryos split. It's crucial to ascertain the type of twins and their placentation arrangement during prenatal assessments. However, it is most common for twins, particularly fraternal ones, to have two distinct placentas. Other options that suggest one or three placentas or none would not accurately reflect the typical scenarios associated with twin deliveries.