30 fetuses, classified as normal according to criteria related to the mother, fetus, childbirth and newborn was selected. By the method of Astrup-Siggaard-Andersen, evaluation of acid-base balance in capillary blood samples obtained from the fetal presentation, using the technique of Saling they were made.

30 fetuses, classified as normal according to criteria related to the mother, fetus, childbirth and newborn was selected. By the method of Astrup-Siggaard-Andersen, evaluation of acid-base balance in capillary blood samples obtained from the fetal presentation, using the technique of Saling they were made.