Natale R, Nasello-Paterson C, Connors G
Department of Obstetrics and Gynecology, University of Western Ontario, London, Canada.
Am J Obstet Gynecol. 1988 Feb;158(2):317-21. doi: 10.1016/0002-9378(88)90146-9.
Continuous 24-hour observations of fetal breathing were performed in 20 normal, pregnant women between 24 and 28 weeks' gestation by real-time ultrasound. Fetuses made breathing movements approximately 14% of the time. No change in breathing activity after a maternal meal was observed, but a significant increase in the incidence of fetal breathing activity was noted overnight. Fetuses at 24 to 28 weeks' gestation breathed at a rate of 44 breaths per minute, and the longest period of apnea noted was 14 minutes. These data suggest that the pattern and incidence of fetal breathing at 24 to 28 weeks' gestation are different from those of fetuses observed in the last 10 weeks of pregnancy. A maturational process in the control of fetal breathing may explain these observations.
在20名妊娠24至28周的正常孕妇中，通过实时超声对胎儿呼吸进行了24小时连续观察。胎儿呼吸运动时间约占14%。未观察到孕妇进食后呼吸活动有变化，但夜间胎儿呼吸活动发生率显著增加。妊娠24至28周的胎儿呼吸频率为每分钟44次，观察到的最长呼吸暂停期为14分钟。这些数据表明，妊娠24至28周时胎儿呼吸的模式和发生率与妊娠最后10周观察到的胎儿不同。胎儿呼吸控制中的成熟过程可能解释了这些观察结果。
