This issue provides valuable information on the many different pulmonary concerns that arise in pregnancy. Topics include: Radiation in pregnancy, Pharmacotherapy in pregnancy and lactation; Respiratory physiology; Asthma in pregnancy; Cystic Fibrosis in pregnancy, Pulmonary embolism in pregnancy; Interstitial lung disease and connective tissue diseases in pregnancy; Pulmonary hypertension in pregnancy; Tuberculosis in pregnancy; Pneumonia in pregnancy; Sleep in pregnancy; Smoking and smoking cessation in pregnancy; High altitude and pregnancy; Fetal oxygenation and ventilation.