Morphological Features of the Endometrium in Patients with Obesity and Early Reproductive Losses

Aim. To clarify and summarize current data on the relationship between morphological features of gravid transformation of the endometrium and early reproductive losses in women with obesity.

Key points. The growing prevalence of obesity worldwide is of serious concern not only due to numerous metabolic complications associated with excess visceral adipose tissue, but also due to reproductive dysfunction in women. Obesity is considered a key factor that increases several times the likelihood of pregnancy complications such as spontaneous abortion, non-viable pregnancy, stillbirth, gestational diabetes mellitus, and preeclampsia. The development of adverse events in the context of maternal obesity may be based on the interaction of biological processes associated with pregnancy and chronic inflammation caused by obesity. However, the causal relationship between BMI and spontaneous abortion is not fully understood, possibly due to the multifactorial effects of excess body weight on pregnancy progression. In addition, BMI as an isolated variable may not reflect other important health risk factors such as nutrition, physical activity, and insulin resistance.

Conclusion. Female obesity is associated with worse natural and assisted conception outcomes, including an increased risk of spontaneous abortion. Low-grade inflammation affecting arterial remodeling, placentation, and uterine immune cell composition and activity in maternal obesity contributes to a high incidence of pregnancy complications. The development of a unified morphological panel that takes into account the main indicators of endometrial transformation processes with an assessment of its receptor profile and diagnostically significant immunological factors will allow verification of endometrial pathology at the molecular level and justification of pathogenetic therapy in the risk group of early reproductive losses in women with obesity.

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