[简答题]NST：

参考答案:NST：Also called fetal acceleration test，is on the basis of fetal movement accompanied period fetal heart rate acceleration.through fetal heart rate change followed fetal movement,get the message of reserve capacity of fetal. Continuous record 20 minutes, at least three times fetal movement with fetal heart rate acceleration ＞15bpm，the duration ＞15 seconds; fetal movement and fetal heart rate acceleration less than that or fetal movement without fetal heart rate acceleration is unusual.