Perinatal Center, Shiga University of Medical Science, Japan.
Department of Obstetrics and Gynecology, Shiga University of Medical Science, Japan.
Women Birth. 2019 Apr;32(2):127-130. doi: 10.1016/j.wombi.2018.06.010. Epub 2018 Jun 28.
Decreased fetal movements are associated with adverse perinatal outcomes, including stillbirth. Delayed maternal visits to a health care provider after perceiving decreased fetal movements are frequently observed in stillbirths. Informing pregnant women of the normal range of fetal movement frequency is essential in their earlier visits in order to prevent stillbirth.
To investigate the fetal movement frequency in late pregnancy and the effects of associated perinatal factors.
This prospective multicenter study was conducted in 20 obstetric facilities in our region of Japan. A total of 2337 pregnant women were asked to record the time it took to perceive 10 fetal movements by the modified 'count to 10' method every day from 34weeks of gestation until delivery.
The 90th percentile of the time for the maternal perception of 10 fetal movements was 18-29min, with a gradually increasing trend toward the end of pregnancy. The numbers of both pregnant women giving birth after 39weeks' gestation and infants with a birth weight exceeding 3000g were significantly higher in mothers who took ≥30min to count 10 fetal movements than in those who took <30min.
The maternal perception time of fetal movements shows a gradually increasing trend within 30min for 10 fetal movements by the modified 'count to 10' method. Informing pregnant women of the normal range of the fetal movement count time will help improve the maternal recognition of decreased fetal movements, which might prevent fetal death in late pregnancy.
胎儿活动减少与不良围产结局相关，包括死产。在死产中，常观察到孕妇感知到胎儿活动减少后，会延迟就诊。告知孕妇胎儿活动频率的正常范围对于其早期就诊至关重要，以预防死产。
调查妊娠晚期的胎儿活动频率及其与相关围产因素的关系。
本前瞻性多中心研究在日本本地区的 20 家产科机构进行。共有 2337 名孕妇被要求使用改良的“数到 10”方法，每天从 34 孕周开始记录感知 10 次胎儿运动所需的时间，直至分娩。
感知 10 次胎儿运动的时间的第 90 百分位数为 18-29min，随着妊娠末期的临近呈逐渐增加的趋势。与计数时间<30min的孕妇相比，分娩孕周≥39 周的孕妇和出生体重超过 3000g的婴儿数量明显更多。
使用改良的“数到 10”方法，10 次胎儿运动的母亲感知时间在 30min 内呈逐渐增加的趋势。告知孕妇胎儿运动计数时间的正常范围有助于提高孕妇对胎儿活动减少的识别能力，从而可能预防妊娠晚期的胎儿死亡。
