Type 1 diabetes in pregnancy carries increased risk for both the mother and the fetus, especially if the mother's hyperglycemia is poorly regulated. As a result of poor regulation of diabetes during the pregnancy mother may experience progression of already existing diabetic complications, and premature birth, as well as develop preeclampsia / eclampsia. Depending on the period of pregnancy during which the blood sugar levels are elevated, fetus may develop embryopathy and fetopathy. The aim of this paper is to show the outcome of pregnancy of diabetic mothers with a special emphasis on the term and the way of completion of the pregnancy, the presence of childbirth traumas in newborns, macrosomal newborns, asphyxic newborns and premature newborns. An observational retrospective study has been conducted. 97 women who gave birth at the Clinic for Female Diseases and Births of UHC Zagreb and at the School of Medicine of the University of Zagreb during 2016 and 2017 took part in the study. 103 newborns from the 97 births in the two observed years were involved in this work. The data was processed using descriptive statistics methods in SPSS 22. The research showed that the average duration of gestation was 37 weeks, and the ratio of premature births before the 37th week was 28.87%. Out of the total number of births by diabetic mothers, 92.80% was carried out with a Caesarean section. Th proportion of macrosomal newborns with birth weight ≥ 90 percentile was 30.10%, while the proportion of asphyxic newborn babies was 5.83%. In the group of newborns born before the 34th week of gestation, one death outcome was recorded. Despite significant advances in diabetology, obstetrics and neonatology, newborns born to diabetic mothers still carry a greater risk of complications both in pregnancy and in the perinatal period than newborns born to healthy mothers.