In consultation with Consulting Editor, Dr. Lucky Jain, Drs. Maximo Vento and Waldemar Carlo have put together a state-of the-art issue of the Clinics in Perinatology devoted to Perinatal Pharmacology. Clinical review articles are specifically devoted to the following: Monitoring and assessment of oxygenation in infants; Oxygen toxicity in neonates; New methods for non-invasive oxygen administration; Targeting oxygen in preterm and term infants starting at birth; Newborn resuscitation in settings without access to supplemental oxygen; Noninvasive versus invasive ventilatory support; Nasal SIMV versus Nasal CPAP before and after invasive ventilatory support; Is high-flow cannula inferior to CPAP for neonates?; Intermittent hypoxia: Importance; Closed-loop control of inspired oxygen in neonates: Compliance with targets; Meta-analysis oxygenation saturation targeting trials: Do infant subgroups matter?; Targets of oxygen saturation to optimize eye outcomes; Achieved oxygenation saturations and outcome in extremely preterm infants; Pulmonary hypertension in preterm infants; and Current recommendations and practice of oxygen therapy in preterm infants. Readers will come away with the latest information on oxygen therapy as they seek to utilize evidence-based recommendations to improve patient outcomes.