Sala M A, Matheus M
Gegenbaurs Morphol Jahrb. 1986;132(2):285-9.
The authors determined the frequency of vasculo-syncytial membranes in different cotyledonary regions of the full-term placenta. There were significant differences according to the site from which the sample was obtained. The highest frequency (164,3%) corresponds to the central-parabasal region of the cotyledon, close to the point of entry of the maternal blood into the intervillous space, whereas the lowest value (104,5%) corresponds to the lateral-subchorial region. The results of the present study as well as those reported by others suggest that the villi from the central-parabasal region are the best adapted ones for gas transfer between maternal and fetal blood.
作者测定了足月胎盘不同子叶区域血管合体膜的出现频率。根据样本采集部位的不同，存在显著差异。最高频率（164.3%）对应子叶的中央-基底旁区域，靠近母体血液进入绒毛间隙的入口点，而最低值（104.5%）对应外侧-绒毛膜下区域。本研究结果以及其他研究报告的结果表明，中央-基底旁区域的绒毛最适合母血与胎儿血液之间的气体交换。
