Menstrual Cycle Changes in Vagally-Mediated Heart Rate Variability are Associated with Progesterone: Evidence from Two Within-Person Studies

What this work gives Aellic

Progesterone, not estradiol, predicts the lower luteal HRV. That makes it an endocrine signal, not exhaustion — penalising it as a recovery deficit was a category error, and that is the justification for the entire seasonal adjustment.

Where this sits in the engine

2 declared sites — constants and thresholds in the code that point at this entry.

• Cycle Phases and cycle-aware baselines 2 sites