The normal maternal changes that every obstetrics question is built on. A rapid, high-yield review of normal pregnancy physiology for medical students and exam candidates.
In this episode: • Naegele's rule = LMP + 7d − 3mo + 1yr • Gestational age: from LMP, 2wk > embryonic • hCG: syncytiotrophoblast → maintains corpus luteum • Chronic respiratory alkalosis (progesterone) • Hypercoagulable state = normal • Pseudocyesis = false pregnancy
Exam pearl: Gestational age = LMP, 2wk > embryonic
