Obstetric pain relief using fentanyl epidurally is a safe and efficient method. In this study the effects of this obstetric analgesia on the adaptation pattern of 26 eutrophic newborns in the first hour of live have been estimated with cardiorespirograph in comparison with a normal groups. We did also determinations of acid-base-balance in arterial blood of umbilical artery and in hyperemic capillary blood of newborns. There were significant differences in basal frequency and the duration till the beginning of resting phase in the cardiorespirogramm. The differences to normal newborns may be correlated to the slight increase of partial pressure of carbon dioxide in the newborns following obstetrical analgesia. During the first hour of life newborns can good compensate. There is no sedation of newborns by fentanyl.