Context: Laboratory tests are a complement of interest as a diagnostic aid, they have great value in intensive care units, especially in the neonatal area where newborns lack specific symptoms to assess certain pathologies, the problem is that this The practice has become routine and excessive, with anemia as the main complication. Purpose. The main objective of this study is to evaluate the complications that occur due to the repeated blood extractions to which neonates are subjected during their hospital stay...Contexto: Los exámenes de laboratorio son un complemento de interés como ayuda diagnóstica, tienen gran valor en las unidades de cuidados intensivos, especialmente en el área neonatal en donde los recién nacidos carecen de síntomas específicos para valorar determinadas patologías, el problema radica en que esta práctica se ha hecho rutinaria y excesiva teniendo como principal complicación la anemia...