Placenta previa results from implantation of the blastocyst in the lower uterine segment, causing the placenta to partially or completely cover the internal cervical os. As the lower uterine segment thins and the cervix begins to efface in the third trimester, the anchoring placental villi are disrupted from the decidua basalis, exposing maternal spiral arteries and causing hemorrhage. The severity of bleeding depends on the degree of placental separation and the vascularity of the implantation site. Complete previa carries the highest risk of life-threatening hemorrhage. The nurse must perform comprehensive hemorrhage assessment, manage fluid resuscitation, coordinate blood product availability, maintain continuous fetal surveillance, and prepare for emergency cesarean delivery. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can fail quietly. When two answers feel partly right, pick the...