Abstract. Introduction. The problem of women's health protection in enterprises producing and using nickel and its compounds is particularly relevant, since women make up a significant contingent of workers at some stages of production. Nickel and its compounds are used in the production of high-alloy steels, alloys with copper, chromium, aluminum, as a catalyst in the processes of hydrogenation of fats, in the production of batteries, nickel-plating of metal products. In case of violations of the technological process, labor protection conditions, workers may be exposed to nickel aerosol and its oxides. Purpose. To study the effect of nickel and its insoluble compounds on the reproductive function of white rats. Method of research. The studies were carried out on sexually mature female white rats weighing 180-200 g with a stable estrous cycle lasting 4-6 days. Experimental studies were conducted in accordance with national and international regulatory requirements ensuring humane treatment of animals used in experiments: Directive 2010/63/EU of the European Parliament and of the Council of the European Union of September 22, 2010 on the protection of animals used in scientific purposes, Order of the Ministry of Health of the Russian Federation of 01.04.2016 No. 199n «On approval of the Rules of good laboratory Practice». The industrial conditions for the action of aerosol of insoluble nickel compounds were simulated in a special chamber with an individual intake of aerosol into the breathing zone at a concentration of 0.2 mg / m3 daily for 4 hours during the entire gestation period. The animals were assessed for the dynamics of body weight on the 1st, 8th, 14th and 20th days of pregnancy. On the 20th day of pregnancy, the number of yellow bodies of pregnancy, placentas and fetuses was determined, pre-, post-implantation and total intrauterine death, average length and weight of fetuses, and average placenta weight were calculated. The total number of pregnant females and fetuses was recorded with the subsequent calculation of the number of fetuses per female. Results. The action of an aerosol of insoluble nickel compounds at a concentration of 0.2 mg / m3 in this mode did not lead to a violation of the reproductive function of white rats in all the studied parameters. Conclusion. The experimental data obtained indicate that insoluble nickel compounds at the level of the maximum permissible concentrations for the air of the working area will not pose a risk of developing reproductive health pathology in working women.
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