Pillai M, James D
Bristol Maternity Hospital, U.K.
Eur J Obstet Gynecol Reprod Biol. 1991 Jan 30;38(2):151-6. doi: 10.1016/0028-2243(91)90193-o.
In late pregnancy, when fetal behavioural states are well developed, human fetuses spend about one third of their time in a quiescent state, 1F. In healthy fetuses biophysical tests often appear suboptimal if recording happens to occur in this state, and as a result prolonged recording may be necessary. We have examined fetal mouthing movements during state 1F in 65 fetuses beyond 36 weeks, with and without risk factors, but in whom there was no immediate evidence of compromise. We found that periodic rhythmical mouthing movements were a characteristic feature of state 1F, occurring in 93.0% of episodes, when the fetal mouth was visible. This compares favourably with variables of the biophysical profile, which were less likely to be satisfactory in state 1F - fetal breathing 53.8%, fetal movements 46.2%, fetal heart rate 69.2%, and overall biophysical score of 8 or 10, 60.0%. We identified objective evidence of fetal compromise (of various aetiologies) in four other fetuses of the same gestational age, and mouthing movements were absent in all four.
在妊娠晚期，当胎儿行为状态充分发育时，人类胎儿约三分之一的时间处于安静状态（1F）。对于健康胎儿，如果记录恰好发生在这种状态下，生物物理测试结果往往不理想，因此可能需要延长记录时间。我们检查了65例孕36周以上胎儿在1F状态下的胎儿口部运动，这些胎儿有或没有危险因素，但当时没有立即出现胎儿窘迫的证据。我们发现，周期性节律性口部运动是1F状态的一个特征，当胎儿嘴可见时，93.0%的时间段会出现这种运动。这与生物物理评分的各项指标相比表现良好，在1F状态下，胎儿呼吸的良好率为53.8%，胎儿运动为46.2%，胎儿心率为69.2%，生物物理总分达到8分或10分的比例为60.0%。我们在另外4例相同孕周的胎儿中发现了胎儿窘迫（病因各异）的客观证据，这4例胎儿均未出现口部运动。
