Ververs I A, de Vries J I, van Geijn H P, Hopkins B
Department of Obstetrics, University Hospital Vrije Universiteit, Amsterdam, The Netherlands.
Early Hum Dev. 1994 Oct 28;39(2):83-91. doi: 10.1016/0378-3782(94)90157-0.
Fetal head position relative to the fetal body was studied longitudinally in 10 uncomplicated pregnancies by means of real-time ultrasound. Registrations were made at 4 weekly intervals from 12 to 36 weeks, and at 38 weeks. The percentage of assessments with optimal visualization of head position for analysis increased with age. The development of head position involved a change from a midline to a lateralized preference. It was only at 38 weeks that a clear lateralized head position was found with the head being held mainly to the right. The degree of intra- and inter-individual variability was considerable, a finding typical of motor behaviour in the healthy fetus. It is hypothesized that this bias is due to neural maturation. The implications of our findings for the subsequent development of hand preference are discussed.
通过实时超声对10例正常妊娠进行纵向研究，观察胎儿头部相对于胎儿身体的位置。从孕12周到36周，每4周进行一次记录，孕38周时也进行记录。用于分析的头部位置最佳可视化评估的百分比随孕周增加而升高。头部位置的发育包括从中线偏好到侧向偏好的转变。仅在孕38周时发现明显的侧向头部位置，头部主要偏向右侧。个体内和个体间的变异性程度相当大，这是健康胎儿运动行为的典型特征。据推测，这种偏向是由于神经成熟所致。本文讨论了我们的研究结果对后续用手偏好发展的影响。
