Patients will be randomize in a Group 1, where these parameters of lung mechanics would be visible and other Group 2, where the parameters of TVe and respiratory flow would not be visible by the rescuer (the usual parameters of PIP and PEEP will be visible). Always, in both groups, current recommendations ventilation measures included in cardiopulmonary resuscitation of newborns of the Spanish Society of Neonatology, based on international recommendations (1-3.5) apply. In turn, the results analyzed in two subgroups between 24 and 27 + 6 weeks gestational age and 28 to 32 + 6 weeks.