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着床过程开始时,哺乳类的合子发育达胚泡阶段,并与将分化为着床点的内膜表面特异区域的上皮发生接触。这些着床点具有某些形态和机能上的特有改变,从而使其有别于非着床点或非妊娠动物的内膜区。着床点的改变包括基质细胞分化为蜕膜以及血管的通透性增加。这些变化都受到激素的控制,并且是细胞表面阴离子丧失的结果,这可能与胚泡能在5～6天前后在着床点处发生着床有关。以上认识为发展某些可能特异性作用于着床点
At the beginning of the implantation process, mammalian zygotes develop up to the blastocyst stage and come into contact with the epithelium that will differentiate into specific areas of the intima surface at the implantation site. These implantation sites have some morphological and functional changes that distinguish them from the non-implantation sites or the intima of non-pregnant animals. Changes in implantation sites include stromal differentiation of stromal cells and increased permeability of blood vessels. These changes are controlled by hormones and are the result of the loss of anion on the cell surface, which may be related to the implantation of the blastocyst at the implantation site around 5-6 days. The above understanding for the development of some may be specific role in implantation point