Kuwata Tomoyuki, Matsubara Shigeki, Ohkusa Takashi, Ohkuchi Akihide, Izumi Akio, Watanabe Takashi, Suzuki Mitsuaki
Department of Obstetrics and Gynecology, Jichi Medical University, Yakushiji, Shimotsuke, Tochigi, Japan.
J Obstet Gynaecol Res. 2008 Jun;34(3):318-23. doi: 10.1111/j.1447-0756.2008.00791.x.
To establish a reference value for the frequency of fetal movements perceived by the mother during the second half of pregnancy.
The study subjects consisted of 705 low risk Japanese pregnant women who continuously received antenatal care. We asked women to record the time required to perceive 10 fetal movements ('count to 10' time) everyday. We asked women to record it, not at a fixed time (i.e. evening time), but whenever they felt the fetus move the most actively. The position during counting (i.e. sitting position) was also not specified, and thus we named this method as modified 'count to 10' method. Satisfactory recordings were obtained from 690 women, which we used for analysis.
The 'count to 10' time was almost the same from 22 weeks (10.9; 7.3-18.0 (median; interquartile range)) until 32 weeks (10.0; 6.2-15.6), and it Thirty-two weeks showed the shortest time, which gradually increased toward 40 weeks (14.8; 9.5-24.0). Its 90th percentile was approximately 25 and 35 min at 22-36 weeks and at 37-40 weeks, respectively.
For the first time we established a reference value for perceived fetal movements throughout the second half of pregnancy. The present modified 'count to 10' method requires less time than the previous method. Approximately 98% (690/705) of women gave us satisfactory recordings. This reference value may be of use in identifying mothers with decreased fetal movements.
建立孕期后半段母亲感知胎动频率的参考值。
研究对象包括705名持续接受产前护理的低风险日本孕妇。我们要求孕妇记录感知到10次胎动所需的时间（“数到10”的时间）。我们要求孕妇不是在固定时间（即晚上）记录，而是在她们感觉胎儿活动最活跃的时候记录。计数时的姿势（即坐姿）也没有具体规定，因此我们将这种方法命名为改良的“数到10”方法。从690名女性中获得了满意的记录，并用于分析。
从22周（10.9；7.3 - 18.0（中位数；四分位间距））到32周（10.0；6.2 - 15.6），“数到10”的时间几乎相同，32周时时间最短，之后逐渐增加至40周（14.8；9.5 - 24.0）。在22 - 36周和37 - 40周时，其第90百分位数分别约为25分钟和35分钟。
我们首次建立了孕期后半段感知胎动的参考值。目前改良的“数到10”方法比以前的方法所需时间更少。约98%（690/705）的女性提供了满意的记录。该参考值可能有助于识别胎动减少的母亲。
