The influence of the respiratory tract stimulation on the cardiac activity of the fetus in pregnant women

The aim of the study was to investigate the impact of the respiratory tract stimulation on the cardiac activity of the fetus in pregnant women. The cardiac contractions rate of the fetus was studied during nasal and oral respiration. It was found, that during the oral respiration cardiac rhythm variability is increased. At the restoration of nasal respiration cardiac rhythm variability of the fetus was recovered. The research sowed that changes of cardiac activity are connected with neuroreflectory and hypoxic mechanisms which occur with the changes of type of respiration in pregnant women.