Piontelli A, Bocconi L, Kustermann A, Tassis B, Zoppini C, Nicolini U
First Department of Obstetrics and Gynaecology, University of Milano, Italy.
Early Hum Dev. 1997 Nov 24;50(1):39-45. doi: 10.1016/s0378-3782(97)00091-1.
The objective of this work was to investigate the emergence of intrapair stimulation between twin fetuses and the presence of possible changes in types and percentage of evoked patterns with advancing gestational age. The existence of intrapair stimulation would indicate the functioning of fetal tactile and proprioceptive sensibility. This was studied from video recordings of 30 min ultrasonographic observations of 8 twin pregnancies at 8, 9 and 10 weeks gestational age, of 20 twin pregnancies at 11, 12 and 13 weeks and of 20 twin pregnancies studied with 60 min observations at 15-16, 18-19 and 21-22 weeks. All age groups were subdivided in Monochorionic (Mc) and Dichorionic (Dc) pregnancies. Intrapair stimulation before 11 weeks gestational age is an exceptional event. Due to greater spatial contiguity and thinness of the membrane dividing the two amniotic sacs in Mc pregnancies, it was noted only in these. From 12 weeks onwards, evoked movements began to be observed in Dc pregnancies as well. After the 15th week, intrapair stimulation is a constant and increasing feature of all twin gestations. Movements vary from generalized bodily activity to being progressively localized. No specific evoked movement patterns were observed.
这项工作的目的是研究双胎胎儿之间配对刺激的出现情况，以及随着孕周增加诱发模式的类型和百分比可能发生的变化。配对刺激的存在将表明胎儿触觉和本体感觉的功能。这项研究基于对8例孕8、9和10周的双胎妊娠、20例孕11、12和13周的双胎妊娠以及20例孕15 - 16、18 - 19和21 - 22周的双胎妊娠进行的30分钟超声观察视频记录。所有年龄组又细分为单绒毛膜（Mc）和双绒毛膜（Dc）妊娠。孕11周前的配对刺激是一个例外事件。由于单绒毛膜妊娠中分隔两个羊膜囊的膜空间更紧密且更薄，这种情况仅在单绒毛膜妊娠中被观察到。从12周起，双绒毛膜妊娠中也开始观察到诱发运动。15周后，配对刺激是所有双胎妊娠持续且增加的特征。运动从全身性身体活动逐渐变为局部性活动。未观察到特定的诱发运动模式。
