Association of Serum progesterone level, Peak Expiratory Flow Rate and obesity in healthy young women.

The study reveals significant hormonal and respiratory changes throughout the menstrual cycle. Progesterone levels and PEFR are markedly higher in the luteal phase, while BMI positively correlates with PEFR. A significant negative correlation exists between Waist Hip ratio (WHR) in the luteal phase. Further studies are needed to explore the underlying mechanisms driving the correlations between progesterone, respiratory parameters, BMI, and WHR in more diverse population.