Long-term reproducibility and clinical utility of endometrial receptivity analysis in guiding personalized embryo transfer: case reports of sustained success over four years post-endometrial biopsy

These findings preliminarily suggest that repeat endometrial biopsy might not be necessary for subsequent pET in RIF patients with similar clinical backgrounds. However, given the small sample size of this case series, further large prospective studies are still needed to confirm the long-term utility of initial ERA results and the appropriateness of omitting repeat biopsies.