Oduor-Okelo D, Musewe V O, Gombe S
J Reprod Fertil. 1983 Jul;68(2):311-6. doi: 10.1530/jrf.0.0680311.
The interhaemal membrane consisted of only two cellular elements: a single layer of cellular trophoblast and the fetal capillary endothelium. The hyrax is therefore one of the few mammals known to possess the cellular haemomonochorial type of placenta. The trophospongium was also cellular while the basal trophoblastic cells were strongly phagocytic. The giant multinucleate cells at the feto-maternal junction were ultrastructurally different from the trophoblast cells and showed no signs of degeneration. Their appearance suggests that they are of maternal rather than fetal origin.
单层细胞滋养层和胎儿毛细血管内皮。因此，蹄兔是已知拥有细胞型血绒毛膜胎盘的少数哺乳动物之一。滋养海绵层也是细胞性的，而基底滋养层细胞具有很强的吞噬作用。胎儿-母体交界处的巨大多核细胞在超微结构上与滋养层细胞不同，且没有退化迹象。它们的外观表明它们起源于母体而非胎儿。
