Within the market taxonomy of Endometrial Receptivity Testing Service, types of tests are distinguished by their analytical methodology and clinical integration. Gene‑expression profiling (e.g., the ERA test) remains the dominant type, offering a validated transcriptomic signature of receptivity and commanding the highest reimbursement rates. Proteomic analysis provides complementary protein‑level insights, appealing to centers pursuing multi‑omics validation but currently occupies a smaller market niche due to higher operational complexity. Imaging‑based receptivity assessment, such as advanced ultrasound or MRI techniques, targets facilities preferring non‑invasive approaches, though its diagnostic precision varies across studies. Integrated multi‑omics platforms combine genomic, proteomic, and metabolomic data, representing an emerging high‑value segment aimed at personalized medicine but limited by cost and regulatory pathways. Each type contributes distinct value propositions and cost structures, shaping the overall market size by influencing adoption rates, pricing strategies, and reimbursement landscapes.