Figure 2From: Studying forced expiratory volume at 1 second over menstrual segments in asthmatic and non-asthmatic women: assessing protocol feasibilityThe log of E1C/PDG ratio of hormone levels (x axis) associated with percent predicted FEV1 (y axis) in the follicular phase among all women. For purposes of illustrating the relationship between hormones and FEV1, the menstrual segment day is held constant at 7 days prior to ovulation date for the plot.Back to article page