The recently documented high survival of extremely preterm infants in Sweden is related to a high degree of centralization of pre- and postnatal care and to recently issued national consensus guidelines providing recommendations for perinatal care at 22-24 gestational weeks. The prevalence of major neonatal morbidity remains high and exceeded 60 % in a recent study of extremely preterm infants born at < 27 gestational weeks delivered in Sweden in 2014-2016 and surviving to 1 year of age. Damage to immature organ systems inflicted during the neonatal period causes varying degrees of functional impairment with lasting effects in the growing child. There is an urgent need for evidence-based novel interventions aiming to prevent neonatal morbidity with a subsequent improvement of long-term outcome.
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