Despite the successes of modern obstetrics and perinatology, stillbirth occupies one of the leading places inthe structure of perinatal morbidity and mortality. Today, every 5-6 women lose a pregnancy, and the majority of spontaneous miscarriages occur in the 1st trimester of pregnancy.The aim of the study is to examine the peculiarities of the course of the gestation period, childbirth and the condition of newborns in patients with a threat of early termination of pregnancy.Materials and methods. We carried out a retrospective analysis of 100 individual charts of pregnant and parturient women with a threat of abortion in the 1st trimester of pregnancy (the main group). In 40 patients (subgroup I), the threat of termination of pregnancy was accompanied by bleeding, in 60 – the threat of termination without bleeding was diagnosed (subgroup II).The control group consisted of 50 pregnant women with the physiological course of the first trimester of pregnancy. Statisticalanalysis was performed according to generally accepted methods of variational statistics. Reliability was assessed by Student's t-test.Differences were considered significant at a significance level of p≤0.05.The conduct of research was approved by the Ethics Committee of the BSMU, which is confirmed by the protocol of the Commission on Biomedical Ethics regarding the observance of moral and legal rules for conducting medical scientific research.Processing of personal data was carried out after receiving the patient's informed consent.Results and their discussion. The research groups were representative in terms of residence, social status, and education. Menstrual and reproductive anamnesis data in the main and control groups also did not differ significantly. The rate of spontaneous abortions and terminations of pregnancy according to medical indications was significantly higher in women with threatened termination of pregnancy both with and without bleeding compared to controls. Patients of the main group had a significantly higher history of both gynecological diseases and extragenital pathology.Pregnant women with retrochorial hematoma and bleeding accounted for 70%, in 30% of women in the 1st trimester of pregnancy, in the presence of bloody secretions, retrochorial hematoma was not diagnosed. The percentage of asymptomatic retrochorial hematomas was 15%. Anomalous location of the chorion in the 1st trimester of pregnancy was diagnosed much more often in the 1st and 2nd subgroups.The analysis of the further course of pregnancy in women with episodes of miscarriage in the early stages of gestation showed that in the main group the level of perinatal complications, such as the threat of premature birth (30%), placental dysfunction (38%), preeclampsia (11%), fetal distress (20%), SZRP (19%) was significantly higher. Accordingly, the rates of premature birth (13%), fetal distress (25%), and labor anomalies (10%) were higher in childbirth.When analyzing the condition of children at birth, the level of moderate asphyxia in the main group was higher than in the control group (8±2.7% and 0%, respectively). The average weight of full-term newborns in the study group was significantly lower (3020.0±21.4) than that of children in the control group (3685.0±28.1 g) (p<0.05).Conclusions.Pregnant women with a threat of miscarriage in the first trimester of pregnancy are a high-risk group for the occurrence of perinatal complications.The level of complications in the II and III trimesters of pregnancy is significantly higher if the threat of early termination of pregnancy was accompanied by bleeding.In pregnant women with bleeding earlier (up to 8 weeks), compared to patients with bleeding at  9-13 weeks, the frequency of threatened miscarriage in the II trimester of pregnancy, premature birth, placental dysfunction, preeclampsia, and SZRP was significantly higher.