胎动是胎儿生命的客现象征之一,胎动不仅是妊娠的诊断依据,而且可作为胎儿是否缺氧的临床指标.胎动减少提示胎儿缺氧,因此胎动计数反映胎儿健康情况,是产前监护的重要方法之一。胎动与孕周的关系正常妊娠时18～20孕周之孕妇可感到胎动,20孕周后随孕周增长胎动渐增,32孕周达高峰后有所下降,过期妊娠则明显减少。32孕周胎动数最多,可能由于羊水量此时最多,胎儿活动空隙较大之故。分娩前一天胎动数急剧下降。胎动的类型胎动分类方法很多,Timor-Tritsch将胎动分为四型:①躯干旋转运动;②单纯四肢运动,③高频率运动;④胎儿呼吸运动。Sadovsky Fetal movement is one of the symptoms of fetus life, fetus movement is not only the basis for the diagnosis of pregnancy, but also as a clinical indicator of fetal hypoxia. Fetal decrease prompted fetal hypoxia, fetal movement count therefore reflects the health status of fetuses, prenatal care is important One of the ways. Fetal movement and gestational age relationship between 18 to 20 gestational weeks of normal pregnancy, pregnant women can feel fetal movement, gestational age increases with gestational age after 20 gestational weeks increased, reached a peak after 32 weeks of pregnancy decreased, expired pregnancy was significantly reduced. 32 gestational weeks the highest number of fetal movement, probably due to the largest amount of amniotic fluid at this time, the larger the gap of fetal activity. The number of fetal motility dropped sharply the day before labor. Types of fetal movement There are many ways to categorize fetal movement. Timor-Tritsch divides fetal movement into four types: ① torso rotation; ② simple limb movements; ③ high frequency exercise; and ④ fetal respiratory movement. Sadovsky