Patrick J, Fetherston W, Vick H, Voegelin R
Am J Obstet Gynecol. 1978 Mar 15;130(6):693-9. doi: 10.1016/0002-9378(78)90330-7.
Human fetal breathing movements in utero at 34 to 35 weeks' gestational age were measured using a real-time ultrasonic scanner. Fetal breathing movements were episodic and occurred 31.8 per cent of the time. Aanalysis of continuous recordings in 10 fetuses from 09:00 to 17:00 hours demonstrated that the percentage of time spent breathing per hour was greater in the afternoon than in the morning. The number of gross fetal body movements was also greater in the afternoon than in the morning. The percentage of time spent breathing was significantly greater during the hour following the noon meal than during the hour preceding the noon meal. It was concluded that real-time ultrasonic scanning permits identification of fetal breathing movements and that between 09:00 and 17:00 hours the character of these movements is related to the time of the day and to the ingestion of food by the mother.
使用实时超声扫描仪测量了孕34至35周时子宫内的人类胎儿呼吸运动。胎儿呼吸运动是间歇性的，出现时间占31.8%。对10名胎儿从09:00至17:00的连续记录分析表明，每小时呼吸时间的百分比下午高于上午。胎儿身体总体运动的数量下午也多于上午。午餐后一小时的呼吸时间百分比显著高于午餐前一小时。结论是，实时超声扫描能够识别胎儿呼吸运动，并且在09:00至17:00之间，这些运动的特征与一天中的时间以及母亲的进食情况有关。
