Endometrial asynchrony in pathogenesis of implantation impairment in women with infertility associated with endometriosis

There is a statistically significant difference in the frequency of implantation in the group of patients with endometriosis associated with infertility compared with the control group. This has been confirmed by a number of different studies. The aim of the study to expand the understanding of the pathogenesis of implantation failures in patients with infertility associated with endometriosis Materials and research methods: The present study included 83 women aged 29 to 43 years (the average age was 33 ± 3.2 years) with a diagnosis of endometriosis (ICD10 code N80.9 Endometriosis, unspecified), as well as infertility (ICD10 code N 97.8, Female infertility of other origin) and repeated implantation failures. All patients of the studied cohort underwent an immunohistochemical study of endometrial biopsy samples taken by the pipel-biopsy of the endometrium during the period of the supposed “implantation window”. Research results: Significant decrease in the immunological labeling of VEGF-A in samples from the ERIF group by ∼2.7 times in comparison with EF group (p <.05), the indices of expression of the proapoptotic protein CASP3 are increased in the samples of the ERIF group in comparison with the EF group (by ∼2.7 times, p <.05) and significant decrease in the expression of HOXA10 in the stromal and glandular compartments (2.4 times; 57.2 vs. 23.5%, p <.05). Conclusion: On the basis of the obtained results of the study, it should be concluded that the basis of implantation impairment in patients with repeated implantation failures associated with endometriosis lies in angiogenetic and apoptotic disorders and leads to implantation failure in the eutopic endometrium due to desynchronous transformation of the epithelial-mesenchymal compartment and disruption of endometrial trophism. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of the ILARM EK (LLC).