Descended marginal sinus of the placenta

Abstract

Key Clinical Message This is the first reported case of descent of the placental marginal sinus through the cervix to the external os. We think marginal sinus rupture does exist. The definition of placental edge should be the parenchyma in diagnosis of low‐lying placentation. Clinically, however, the low‐lying marginal sinus should be treated similar to low‐lying placentation.

Keywords

• descended marginal sinus
• low‐lying placentation
• marginal sinus of the placenta
• placenta previa
• placental edge
• rupture of the marginal sinus