Aim: The objective of this literature review was to determine the current aspects of the clinic, diagnosis and treatment of uterine leiomyoma in women of reproductive age. 

Materials and methods: Pubmed, Google Scholar, Web of Science, and Scopus databases were used to search for materials on current aspects of the clinic, diagnosis, and treatment of uterine leiomyoma in women of reproductive age. 

Conclusions: Women who have a pregnancy in the background of leiomyomas of the uterus, constitute a high-risk group for the occurrence of obstetric and perinatal complications, therefore, in the most dangerous periods of pregnancy, hospitalization in a specialized obstetrical hospital is recommended. It is advisable to exclude the tactics of passive surveillance of women of childbearing age with leiomyoma of the uterus. Women of childbearing age with leiomyoma of the uterus are recommended to carry out organ-preserving operations in the volume of leiomyomectomy in order to preserve the reproductive function of the woman.

Aim: To study the process of hemoglobin oxidation and the enzymatic reactions associated with it.
Materials and Methods: Heparinized human blood (15 IU/ml) was obtained from the clinical department. The concentration of oxy- and methemoglobin,
auto-oxidation of hemoglobin was determined spectrophotometrically spectrophotometrically. Autooxidation of hemoglobin was recorded spectrophotometrically, and protein concentration was determined by the Lowry method. Monooxygenase activity of hemoglobin was also measured by the method described
by Lowry spectrophotometrically. The concentration of O₂ and H₂O₂ in the reaction media was determined on a biomicroanalyzer OR 210/3 (Redelkis).
Results: The obtained experimental data allow us to propose a mechanism of “spontaneous autooxidation” of oxyhemoglobin, which can be described by
the following equations:
Hb²⁺O₂ = Hb³⁺ + O₂ (1)
Hb²⁺O₂ + 2e^- + 2H⁺ = Hb³⁺ + H₂O₂ (2)
Hb²⁺O₂ + 2e ^- + 2H⁺ = Hb²⁺ + H₂O₂  (3)
Hb²⁺ + O_{2 ⁼}  Hb²⁺O2 (4)
Spectral characteristics of the process of “spontaneous auto-oxidation” indicate the formation of a metform of hemoglobin, the depletion of oxygen by the system was established, at pH 5.6, an increase in the monooxygenase activity of hemoglobin is observed 3-4 times compared to the physiological level.
Сonclusions: In addition to the main, previously known functions of hemoglobin (gas transport, peroxidase, monooxygenase), it catalyzes a two-electron
oxidase reaction in which O₂
 is reduced to H₂O₂. This is confirmed by experimental data on the formation of one of the products of “spontaneous autoxidation”
of oxyhemoglobin _ deoxyform at pH 5.6 _ 8.9.
 KEY WORDS: oxyhemoglobin, methemoglobin, autooxidation, monooxygenase activity, oxidase reaction, ligands