Laboratorial Tests The laboratorial exams will be performed based on maternal samples, drawn during the pre-natal period and on samples of the newborn, drawn at birth (blood of the umbilical cord) and through heel puncture and withdrawal of 2 capillary tubes. These capillaries will be centrifuged and the total bilirubin will be measured by the Bilirubin Meter B105, ERMA INC.). The technicians to perform the exams will not be aware of the allocated group of the patient under examination.