Babies are followed in the NICU and clinical condition recorded. Serial examinations for ROP and Auditory evoked potentials will be performed. Neurodevelopmental outcome is evaluated at 2 years of postnatal life. Main outcome: Achievement of a target saturation of 85% at 15 min of life. Secondary outcomes: acute complications during delivery; chronic complications (BPD, ROP, IPVH); mortality in the neonatal period.