PLE-4599

Mary, a 32-year-old non-diabetic and non-hypertensive, is currently pregnant with her second child (at 34 weeks AOG). Suddenly, she experienced non-painful vaginal bleeding while asleep. Her husband, Roel, woke her up in a pool of blood and accompanied her to the nearest private hospital. Roel is anxious to know the cause of her bleeding. As the physician on duty, what is your primary diagnosis?