Luterkort M, Marsál K
Early Hum Dev. 1985 Jan;10(3-4):193-200. doi: 10.1016/0378-3782(85)90050-7.
Intrauterine motor activity was studied in breech presenting but otherwise normal fetuses. In the first part of the study, 48 fetuses were examined in the 33rd gestational week with an objective method using four piezo-electric crystals attached to the maternal abdomen for recording fetal movements. Of the 48 fetuses, 25 remained in breech presentation until delivery, while 23 assumed the vertex presentation before birth. In the second part of the study, 63 pregnant women with breech-presenting fetuses in the 33rd gestational week subjectively recorded perceptible movements every evening. Spontaneous cephalic version occurred in 40 cases, and 23 fetuses persisted in the breech presentation until delivery. Neither in the objective nor in the subjective study were any quantitative differences in motor activity found between fetuses subsequently born in breech presentation and these born in vertex presentation.
对臀位但其他方面正常的胎儿进行了宫内运动活动研究。在研究的第一部分，在孕33周时使用附着于孕妇腹部的四个压电晶体以客观方法检查了48例胎儿，用于记录胎儿运动。在这48例胎儿中，25例直至分娩时仍为臀位，而23例在出生前转为头位。在研究的第二部分，63例孕33周臀位胎儿的孕妇每晚主观记录可感知的运动。40例发生了自发头位倒转，23例胎儿直至分娩时仍为臀位。在客观研究和主观研究中，随后以臀位出生的胎儿与以头位出生的胎儿之间均未发现运动活动的任何定量差异。
