[Normal values of gases in the vein of the umbilical cord during the postpartum period and postcesarea immediately in normal fetuses to term].

Background: To be able to diagnose and catalogue a patient with imbalance of the acid basic condition a gasometría must be realized. The pH and the gasometría of the blood of umbilical cord are useful tools to study the immediate situation of the newborn child. The values gasométricos in the vein and the artery of the umbilical cord change according to the geographical altitude.