While there is no increased risk of fetal anomalies with this abnormality, bilobed placentas can be associated with first-trimester bleeding, polyhydramnios, abruption, and retained placenta. A placenta with more than two lobes is rare and is termed a multilobate placenta.

Why do I have a bilobed placenta?

Usually in singleton pregnancy, there is one placenta and one cord. But bilobed placenta is thought to result from localized atrophy as a result of poor decidualization and vascularization in a part of the uterus2. Usually it is associated with velamentous insertion of cord.

Is Bilobed placenta normal?

The normal placenta is round to oval in shape. In contrast to the normal architecture described, placentas may infrequently form as separate, nearly equally sized discs. This is a bilobed placenta, which is also known as bipartite placenta or placenta duplex or bilobate placenta [1].