In eutopic endometrium in patients with adenomyosis group, LPA1 staining was localized to the cytoplasm, membrances of the epithelial cells of the endometrial glands, LPA2, LPA3 and LPA5 were localized to the nuclei of both stromal and glandular cells, LPA4 was little in both stroma and epithelial cells. Here, LPAR3 is linked to adenomyosis.