结论：S T改变相关的胎心率低高频比值变异能更好的反应新生儿代谢性酸中毒。
Conclusions Relative changes in LF/HF ratio of FHR variability in relation to a significant ST-event are more pronounced in fetuses born with metabolic acidosis.
基线胎心率，加速，反应性，减速，宫缩频率。
Fetal Heart rate Strip: Baseline rate, accelerations, reactivity, decelerations, contraction frequency.
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