The symbol phenomenon of embryo transferring is embryo implantation, which is a highly coordinated event that involves the number of embryo, embryo quality and endometrial receptivity.

• 胚胎移植成功的标志性事件是胚胎着床。着床是一个高度协调的事件,影响胚胎着床的因素主要有胚胎质量和子宫内膜容受性两方面。