Why are the signs and symptoms of ectopic pregnancy potentially life-threatening?

• A. The placenta separates as the cervix dilates and cause uncontrolled internal bleeding.
• B. The implanted embryo causes an infection that descends from the uterus into the vagina.
• C. The placenta separates from the uterine wall and causes uncontrolled internal bleeding.
• D. The embryo ruptures the Fallopian tube and causes uncontrolled internal bleeding.

Answer: (D)

In an ectopic pregnancy, the embryo implants outside the uterus, most often in the Fallopian tube. The tube isn’t capable of expanding to accommodate a growing pregnancy, and its walls or nearby blood vessels can rupture. When rupture occurs, blood spills into the abdominal cavity, causing rapid internal bleeding. That sudden hemorrhage can lead to hypovolemia and shock quickly, which is why the situation is potentially life-threatening. The pain is often intense and sudden, and patients may experience dizziness or fainting as blood pressure drops, sometimes with referred shoulder pain from irritation of the diaphragm by the free blood.

The other scenarios aren’t the primary cause of the dangerous bleeding in ectopic pregnancy. There isn’t a functioning placenta within the Fallopian tube to detach, and an infection descending from the uterus into the vagina isn’t the mechanism driving the acute, life-threatening bleed in this context.