What classification of placenta previa means the cervical os is completely covered by the placental attachment?

• A. Partial previa
• B. Marginal previa
• C. Complete or total previa
• D. Low-lying previa

Answer: (C)

The classification of placenta previa where the cervical os is completely covered by the placental attachment is known as complete or total previa. In this condition, the placenta is situated in such a way that it fully obstructs the opening of the cervix, which can lead to complications during pregnancy and childbirth, including bleeding and the requirement for a cesarean delivery.

Complete previa poses significant risks, as the presence of the placenta over the cervix can prevent vaginal delivery and may endanger both the mother and the fetus if bleeding occurs. Understanding this classification is crucial for prenatal care and planning for delivery, as it helps healthcare providers anticipate the need for additional interventions to ensure the safety of both the mother and baby.

Other classifications, such as partial, marginal, and low-lying previa, describe situations where the placenta is either only partially covering the cervix, located at the edge of the cervix, or positioned near but not covering it, respectively. These classifications indicate different degrees of potential complications and management strategies.