目前有些临床研究者认为,确定胎儿健康情况的切实可行的重要方法为,在分娩过程中随时根据胎儿心电图R波计算出的胎儿心率而评定其变异性。本研究有两个目的:确定胎儿心率变异性的正常值,和确定分娩时常用药物对于胎儿心率变异性的影响。作为研究对象的90名产妇,除可能应用催产素外,于研究开始前的至少3小时内均未用过任何药物。观察开始时产妇胎膜均已破水,宫口扩张3～7厘米。观察期间每一患者于产科医师认为需 At present, some clinical researchers believe that an important and feasible method for determining the fetal health status is to assess the variability of the fetus heart rate based on the fetal ECG R wave at any time during childbirth. This study has two purposes: to determine the normal value of fetal heart rate variability, and to determine the effect of commonly used medications on fetal heart rate variability during labor. As a study object, 90 mothers, except possibly oxytocin, had not used any medication for at least 3 hours prior to the study. Observation of the beginning of maternal membranes have been broken water, cervix 3 to 7 cm. Each patient during the observation period was deemed obstetrician