Figure 3.

Postnatal estradiol (E₂) administration causes improvements in pulmonary function. (A) Expiratory resistance (cm H₂O/ml/s) and (B) compliance (ml/cm H₂O/kg) were measured by whole body plethysmography. Open circles = control group; Closed circles = estradiol group. Reported values are for the respiratory system as a whole. Values are mean ± SEM, n = 8 and 9 for control and E₂ groups, respectively. Statistical comparisons were made between groups by two-way ANOVA. P < 0.05 for expiratory resistance and for compliance. Exp. Res. = expiratory resistance.