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Men are from Mars, Women are from Venus. Gender specific changes in pulmonary function in 1 year old rats after neonatal hyperoxia exposure

Preterm birth affects about 11% of pregnancies worldwide. The Institute of Medicine estimated the cost associated with premature birth to be $36 billion in 2016. Lungs in preterm infants are in the critical saccular stage of lung development and susceptible to the oxygen‐induced chronic lung disease known as bronchopulmonary dysplasia (BPD). BPD is characterized by functional abnormalities including decreased saccular/alveolar septation, decreased microvascular cross‐sectional area with or without pulmonary hypertension, airway injury with or without increased airway reactivity, and abnormalities of control of breathing in various combinations. While the initial inflammation improves, chronic inflammation ensues for a long time. We tested how neonatal hyperoxia exposure affects lung function one year after birth. We postulated an increase in lung collagen levels reflected by reduced pulmonary function.