Nasello-Paterson C, Natale R, Connors G
Department of Obstetrics and Gynecology, University of Western Ontario, London, Canada.
Am J Obstet Gynecol. 1988 Feb;158(2):312-6. doi: 10.1016/0002-9378(88)90145-7.
Continuous 24-hour observations of fetal gross body movements were performed in 20 women between 24 and 28 weeks of gestation by means of real-time ultrasound examination. At 24 to 26 weeks, fetuses moved 13.1% +/- 0.3% of the time, which was not significantly different from the incidence of 12.4% +/- 0.8% at 26 to 28 weeks' gestation. An examination of the number of movements per hour demonstrated that fetuses at 24 to 26 weeks' gestation moved on the average 53.4 +/- 1.6 times/hr, which was significantly different from 26 to 28 weeks' gestation when fetuses made 46.2 +/- 1.4 movements/hr. When examined on an hourly basis, fetuses in both age groups demonstrated a significant increase in the number of movements overnight from 2300 to 0800 hours. Intermovement intervals were also examined. Ninety-nine percent of intervals less than 6 minutes in both age groups contained movement. The longest observed quiescent interval was 24 minutes in both age groups. These data suggest that the incidence of fetal body movements is different than that observed in fetuses during the last 10 weeks of gestation. Fetuses at 24 to 28 weeks' gestation exhibit a diurnal pattern of fetal movement and move more frequently than do older fetuses. However, these movements are of a sporadic nature and relatively short duration. Thus these fetuses do not appear to have well-defined periods of rest and activity.
在20名妊娠24至28周的女性中，通过实时超声检查对胎儿的全身大体运动进行了连续24小时观察。在24至26周时，胎儿活动时间占13.1%±0.3%，与妊娠26至28周时12.4%±0.8%的发生率无显著差异。对每小时胎动次数的检查表明，妊娠24至26周的胎儿平均每小时胎动53.4±1.6次，与妊娠26至28周时胎儿每小时胎动46.2±1.4次有显著差异。按小时检查时，两个年龄组的胎儿在夜间23:00至08:00的胎动次数均显著增加。还检查了胎动间隔时间。两个年龄组中，99%间隔时间小于6分钟的时段都有胎动。两个年龄组观察到的最长静止间隔均为24分钟。这些数据表明，胎儿身体运动的发生率与妊娠最后10周胎儿的情况不同。妊娠24至28周的胎儿表现出昼夜胎动模式，且比孕周较大的胎儿胎动更频繁。然而，这些胎动具有散发性且持续时间相对较短。因此，这些胎儿似乎没有明确的休息和活动周期。
