Fig. 6From: Respiratory consequences of N95-type Mask usage in pregnant healthcare workers—a controlled clinical studyOxygen and Carbon dioxide content of inspired air in pregnant women at rest and following exercise. (a) Forced inspired O2 (FiO2) and (b) forced inspired CO2 concentrations (FiCO2) were measured with a metabolic cart. N = 19 (±SEM)Back to article page