Key Concepts
Overview
Spontaneous abortion (miscarriage): Involuntary pregnancy loss before 20 weeks gestation. Affects ~15–20% of known pregnancies; ~50% of all conceptions. Most common cause: chromosomal abnormality (50–60%). Other causes: uterine anomaly, cervical insufficiency, infection, maternal illness, thrombophilia. 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 one that reduces imminent harm and matches orders for the role you were given. Train yourself to state the primary risk in one short phrase before you read the options so distractors do not rewrite your priority list. 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...