Clarification of autonomic functions of fetuses over time from the late stage of pregnancy to the intrapartum period by heart rate variability analysis

为了明确胎儿在孕期和产期的自主神经功能，设计了一种从多普勒心率信号中检测与心电R波对应的峰值的方法。为了验证这种检测方法的有效性，对成人和新生儿同时进行了心率信号和心电图的评估，并检验了这些数据的相关性。结果表明，这些数据具有很高的相关性，可以用于研究。对孕妇进行测量，以检查胎儿的自主神经功能和母亲与胎儿之间的同步性。为了在未来开展这项研究，将利用超声图像等验证在胎儿中检测到的峰的充分性。

A method for detecting a peak corresponding to an electrocardiographic R wave from Doppler heart rate signals was devised to clarify autonomic functions of fetuses during pregnancy and the intrapartum period. In order to verify the validity of this detection method, evaluation of heart rate signals and electrocardiography was conducted simultaneously in adults and newborns and the correlation of these data was examined. The results indicated that these data had a high correlation and could be used for the study. Measurements were conducted on pregnant women to examine the autonomic functions of fetuses and the synchronism between mothers and fetuses. In order to develop this study in the future, the adequateness of the peaks detected in fetuses will be verified by using echographic images, etc.