Randomization and blinding The randomization will be performed by drawing blocks of different sizes. In order to avoid that the health professionals in the nursery know which product is being infused into the newborns (Immunoglobulin or Saline Solution 0.9%) the syringes with the required volumes will be prepared in the pharmacy and wrapped in aluminum foil. The color of the products is similar. The newborns will be monitored and clinically followed-up before, during and after the two groups equally receive the infusion. All clinical changes such as cardiac and respiratory frequency and hemoglobin saturation will be recorded before and after the infusion in the two groups. All newborns, before and after the procedure, will be submitted to Glucose dosages by screening method (Blood sugar test).