About 90% of successful embryo implantations occur at the bottom of the uterus.
Microblood flow and molecular expression in this area are considered to be the optimal environment for accepting embryos (Jinno M, et al., Fertility and Sterility, 2001; 76: 1168-1174).
At our hospital, we grasp the uterine morphology of each patient, and perform biopsy and subsequent ET (embryo transfer) with this in mind.