Tedde G, Tedde Piras A
Acta Anat (Basel). 1978;100(1):114-9. doi: 10.1159/000144889.
The mitotic index of the Langhans' cells of the normal human placenta has been evaluated from the 6th week of pregnancy until the term. The index is very high from the 6th to the 10th week, and afterwards it decreases quickly. However, some dividing cells are present also in placentas of 30-32 weeks. The high number of mitotic cells is considered to be related to the increase of the syncytial layer more than to the HCG production. This latter would be independent of the proliferative activity of the Langhans' cells and is probably affected by some humoral factors.
对正常人类胎盘朗汉斯细胞的有丝分裂指数进行了评估，评估时间从妊娠第6周直至足月。在第6至10周时该指数非常高，之后迅速下降。然而，在30 - 32周的胎盘中也存在一些正在分裂的细胞。有丝分裂细胞数量多被认为与合体层的增加有关，而不是与HCG的产生有关。后者可能独立于朗汉斯细胞的增殖活性，并且可能受某些体液因子的影响。
