The perimenopause period is characterized by a gradual extinction of ovarian function, during which hypoluteinism is replaced by anovulation with relative hyperestrogenia and then hypoestrogenia. At any stage of perimenopause, there is a high probability of the formation of menstrual dysfunction, in particular, abnormal uterine bleeding (AUB). The frequency of AUB in premenopause reaches 60-70% among gynecological diseases [5, 12, 18]. Today, hysteroscopy is becoming increasingly important as a method for detecting intrauterine pathology in patients with abnormal uterine bleeding. [11.13]. The pathology of the endometrium and uterine cavity is represented by hyperplastic processes, uterine body leiomyoma, developmental abnormalities (Müller's abnormalities), inflammatory and immunopathological conditions, tumor processes that are clinically manifested by abnormal bleeding, as well as changes in neighboring organs and systems resulting from tumor damage.