The trophoblast adhesion to the uterine wall is the requisite first step of implantation and , subsequently , placentation .

紧贴在子宫壁的滋养层是胚胎着床必不可少的步骤，随后形成胎盘。

This culture system may be useful in screening anti early pregnancy drugs and studying the function of the trophoblast cells in vitro .

这种培养方法的建立不仅为抗早孕药物筛选提供一个离体模型，而且有助于滋养层细胞功能的研究。

Conclusions : the study suggests that the proliferation and adhesion of trophoblast in placenta of patients with early abortion was declined .

结论：研究提示早期自然流产患者胎盘中滋养细胞增殖、粘附能力下降。