Which term refers to the decidua exclusive of the area occupied by the implanted conceptus; aka decidua vera?

Which term refers to the decidua exclusive of the area occupied by the implanted conceptus; aka decidua vera?

• A. Decidua Basalis
• B. Decidua Capsularis
• C. Decidua Parietalis
• D. Empty Amnion Sign

Answer: (C)

In pregnancy, the decidua differentiates into three regions: the part directly under the implanted conceptus is decidua basalis, the portion covering the conceptus toward the uterine cavity is decidua capsularis, and the remaining lining of the uterine cavity is decidua parietalis, also known as decidua vera. The term describing the decidua outside the area occupied by the implanted conceptus is decidua parietalis (decidua vera). As gestation progresses, capsularis and parietalis may fuse, but the definition remains that parietalis lies apart from the implantation site. The empty amnion sign is an ultrasound finding, not a decidual region.

In pregnancy, the decidua differentiates into three regions: the part directly under the implanted conceptus is decidua basalis, the portion covering the conceptus toward the uterine cavity is decidua capsularis, and the remaining lining of the uterine cavity is decidua parietalis, also known as decidua vera. The term describing the decidua outside the area occupied by the implanted conceptus is decidua parietalis (decidua vera). As gestation progresses, capsularis and parietalis may fuse, but the definition remains that parietalis lies apart from the implantation site. The empty amnion sign is an ultrasound finding, not a decidual region.