Introduction. Loss of pregnancy remains an extremely acute public health problem today. Live birth accounts for only 30% of gestational outcomes, all other pregnancies that occur end in reproductive losses: 30% – implantation, 30% – postimplantation, 10% – spontaneous miscarriages. In conditions of declining birth rates, reducing reproductive losses is the most important element of the state’s demographic policy.Аim. Тo assess the reproductive health of women of fertile age in the Tyumen region, registered in antenatal clinics and other medical institutions in connection with pregnancy, as well as the risks associated with an increase in the frequency of diseases endemic for the West Siberian region.Materials and methods. The study used data from federal statistical observation. Statistical analysis of the data was carried out using the statistical program Statistica (version 13.0). Quantitative features are described by absolute and relative (percent) indicators. The difference is considered significant at p < 0.05. Results. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate. The incidence of HIV and hepatitis C among pregnant women for five years and for each of the given nosologies exceeds 1% of the number of patients admitted under the supervision of health care facilities. At the same time, since 2018, the incidence of ectopic pregnancy associated with HIV has significantly increased (p >< 000.1). These data also indicate an increased risk of spontaneous abortion in HIV-infected pregnant women (p >< 000.1). From 2016 to 2019, there has been a steady increase in the incidence of ectopic pregnancies and spontaneous abortion in primary pregnant women. The situation has improved somewhat in 2020. Noteworthy is the high share of medical abortion in birth control. Сonclusions. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate. >< 0.05.Results. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate. The incidence of HIV and hepatitis C among pregnant women for five years and for each of the given nosologies exceeds 1% of the number of patients admitted under the supervision of health care facilities. At the same time, since 2018, the incidence of ectopic pregnancy associated with HIV has significantly increased (p < 000.1). These data also indicate an increased risk of spontaneous abortion in HIV-infected pregnant women (p >< 000.1). From 2016 to 2019, there has been a steady increase in the incidence of ectopic pregnancies and spontaneous abortion in primary pregnant women. The situation has improved somewhat in 2020. Noteworthy is the high share of medical abortion in birth control. Сonclusions. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate. >< 000.1). These data also indicate an increased risk of spontaneous abortion in HIV-infected pregnant women (p < 000.1). From 2016 to 2019, there has been a steady increase in the incidence of ectopic pregnancies and spontaneous abortion in primary pregnant women. The situation has improved somewhat in 2020. Noteworthy is the high share of medical abortion in birth control. Сonclusions. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate. >< 000.1). From 2016 to 2019, there has been a steady increase in the incidence of ectopic pregnancies and spontaneous abortion in primary pregnant women. The situation has improved somewhat in 2020. Noteworthy is the high share of medical abortion in birth control.Сonclusions. Despite the increase in the number of women of reproductive age, fertility rates are declining both in the Tyumen region and in the Ural Federal District, as well as in Russia as a whole. The 5-year dynamics of registered pregnancies in the Tyumen region correlates with the dynamics of the birth rate.