The Endometrial Receptivity Assay (ERA) is a medical test used to assess the optimal timing for embryo implantation during in vitro fertilization (IVF) procedures. It involves analyzing a woman’s endometrial tissue to determine the most suitable window of receptivity for embryo transfer. By pinpointing the precise timing when the endometrium is most receptive to embryo implantation, the ERA aims to increase the chances of successful IVF outcomes. The test involves obtaining a biopsy of the endometrial lining and analyzing genetic markers to identify the appropriate timeframe for embryo transfer, customizing the IVF protocol to align with the woman’s individual cycle.