[Neurophysiologic and clinical aspects of intranatal fetal hibernation].

On the basis the results of the study on the state of the fetus in 96 physiological parturitions (using a number of clinical and physiological techniques) and analysis of the literature data concerning changes in the parturient-placenta-fetus system and especially of the levels of a number of biologically active substances and the investigation of their physiological properties, the proposition is substantiated that in parturition, particularly at its second stage, the fetus is in the state of profound hybernation. The question is discussed concerning differential diagnosis of the status of intranatal hybernation of the fetus and other conditions (asphyxia, shock of the newborn, etc.). The study is of importance for perinatology, clinical neurology of the neonatal period, obstetrics and evolutional physiology.