Key Concepts
Overview
The luteal phase begins at ovulation and lasts approximately 14 days (the most consistent portion of the menstrual cycle). The ruptured follicle undergoes luteinization under LH influence to form the corpus luteum, which becomes the primary source of progesterone during the second half of the cycle. The luteal phase ends either with menstruation (no pregnancy) or corpus luteum rescue by hCG (pregnancy). 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...