Genital endometriosis is a disease of women of reproductive age, accompanied by infertility in 50% [1]. Adenomyosis can be considered as an endometriosis of the uterus. Histologically, this process is represented by ectopic, non-tumor endometrial glands, and stroma surrounded by hypertrophic and hyperplastic myometrium [2]. Adenomyosis is accompanied by pelvic pain of varying intensity as well as menstrual disorders [1]. The disease is accompanied by significant violations of reproductive function (infertility, unsuccessful attempts at pregnancy and miscarriage, abnormal uterine bleeding). Adenomyosis can be accompanied by a violation of the function of adjacent organs (such as the bladder, rectum). Often, one of the clinical manifestations of adenomyosis is the development of sideropenic syndrome, which is also caused by the development of chronic post-hemorrhagic iron deficiency anemia. This is accompanied by a deterioration in the general condition of patients, a decrease in their ability to work. Despite a large number of publications in Russian and foreign scientific sources devoted to this problem, reproductive doctors and obstetricians-gynecologists often underestimate the role of adenomyosis in pregnancy planning using assisted reproductive technologies. Without interpreting the anamnesis data obtained through an active survey, doctors do not prescribe additional methods for diagnosing this pathology, which is not complex and expensive. To confirm the diagnosis, a transvaginal ultrasound examination of the pelvic organs during the premenstrual period is sufficient. In cases that are difficult to diagnose, the MRI method of the corresponding anatomical area can be used. Underestimation of the clinical picture and under-examination of the patient did not allow prescribing timely correction of the pathology and led to unsuccessful attempts to implement the generative function using assisted reproductive technologies. The conducted examination with clarification of the cause of IVF failures and the prescribed reasonable treatment made it possible to achieve regression of endometriosis foci in this clinical situation, followed by the patient's ability to realize generative function.