The group of patients who underwent the ERA test (140/281), in which a personalized embryo transfer was carried out when the endometrium was receptive, obtained a 50% clinical pregnancy rate (70/140), while the group guided by a standard transfer obtained a much lower pregnancy rate, namely 24.8% (35/141). Thus, the results show a 25% increase in the pregnancy rate following the personalized implantation window study with the ERA test.