In obstetric emergencies, how do placental abruption and placenta previa differ and how are they managed in the ED?

• A. Abruptio placentae causes painful bleeding; previa causes painless bleeding; monitor fetal status; prepare for delivery if unstable; administer Rh immunoglobulin as indicated.
• B. Abruptio placentae is painless bleeding; previa is painful bleeding; management is identical.
• C. Both placental disorders cause painless bleeding and require observation only.
• D. Abruptio placentae is managed with antibiotics; previa with immediate surgical delivery.

Answer: (A)