Figure 4From: Effects of sex hormones on bronchial reactivity during the menstrual cycle Relationship in each subject, evaluated twice (in both the follicular and luteal phases), between serum 17β-estradiol (ESTR; panel A) and progesterone (PRG; panel B) levels on the x-axes versus the PC20meth on the y-axes using a in logarithmic scale. No one of the relationships reached statistical significance. P > 0.05.Back to article page