Modern concepts about the problem of endometrial infertility against the backdrop of the "thin endometrium" (literature review)

Endometrial infertility is the cause of inadequate implantation and serves as an obstacle to the onset and progression of spontaneous pregnancy and the implementation of assisted reproductive technology (ART) programs. One of the most common mechanisms for the development of infertility is endometrial thinning. Despite the abundance of publications, today there are no generally accepted diagnostic criteria and treatment and rehabilitation approaches for this pathology, which encourages continued scientific research in this direction. Aim was to highlight the problem of decreased fertility caused by “thin endometrium”. To create the review, the bibliographic method was applied and domestic and foreign literary sources from the Pubmed, MedLine, RSCI, e-library and Cyberleninka search engine databases were used. The search depth was 10 years. The following search phrases were used: “uterine factor of infertility”, “endometrial factor of infertility”, “thin endometrium”. Seventy five sources that were included in this review were studied and analyzed. Data presented in the literature indicate that endometrial causes of infertility are associated with incompetence of the uterine cavity mucosa, which may manifest itself as a phenomenon of ”thin endometrium”, the development mechanisms of which have not yet been fully studied. Determining the functional status of the endometrium is very important for predicting the onset of pregnancy in the natural cycle or in ART programs, since even in the presence of a good quality embryo, endometrial deficiency can prevent adequate implantation. Thus, before planning a subsequent pregnancy, it is necessary to diagnose and, if possible, neutralize or correct endometrial causes of infertility. One of the main markers of readiness for implantation at the moment is the thickness of the endometrium.