Distribution of ventilation in pregnant Shetland ponies measured by Electrical Impedance Tomography

► We demonstrate in standing Shetland ponies a progressively decreasing ventilation of dependent lung regions compared with non-dependent ones with pregnancy duration. ► After parturition ventilation distribution changes immediately showing a more balanced ventilation distribution. ► Electrical Impedance Tomography enables repeated and safe (lack of radiation) assessment of lung aeration during pregnancy.