Abruptio placenta is premature separation of a normally situated placenta, which can cause vaginal bleeding. It has three types - revealed, concealed, and mixed. Risk factors include hypertension, smoking, trauma, cocaine use, anticoagulation, and others. Clinically, it presents with abdominal pain, vaginal bleeding, and uterine contractions. Diagnosis involves assessing blood loss, fetal maturity, and testing coagulation. Management depends on gestational age and severity of bleeding, and may involve induction of labor, Cesarean section, or conservative treatment. Complications for both mother and baby can be life-threatening without proper care.