The trend towards an increase in the number of caesarean sections (CS) has led to the fact that many women are more likely to plan a second pregnancy with a caesarean scar niche. According to current data, planning pregnancy with a niche may be associated with a decrease in the likelihood of successful implantation, which is a consequence of the uterine form of secondary infertility. In the context of studying the effect of stagnant contents in the projection of the niche on fertility, it is important to assess the prevalence of chronic endometritis (CE) and use new knowledge to personalize patient management schemes in achieving reproductive goals