This book presents current data in the diagnosis and treatment of abnormal uterine bleeding during perimenopauseDespite great advances, recurrences and malignizations are still observed. They lead to repeated manipulations, unsatisfactory results, disability, and worsen prognosisThe monograph describes the causes of abnormal uterine bleeding, its classification, clinical manifestations, diagnosis including molecular genetic methods, and treatment algorithm for women with abnormal uterine bleeding during perimenopause. Based on an analysis of our own clinical observations and the literature data on the management of women with abnormal uterine bleeding, we have developed an algorithm for the management of women with abnormal uterine bleeding depending on the clinical and morphogenetic studies.The book is intended for obstetricians-gynecologists, general practitioners, researchers, masters and clinical residents of medical universities.