AIM: The aim of study was to compare some perinatal outcomes in mothers with type 1 diabetes mellitus (T1DM). MATERIAL AND METHODS: All patients with T1DM delivered at the 1st Department of Obstetrics & Gynaecology of Faculty of Medicine, Comenius University in Bratislava from January 1st 2009 to December 31th 2015 were included to the study. RESULTS: Out of 118 diabetic mothers, 46.6 % had vasculopathy and 53. 4 % were without microvascular complications. In the vasculopathy group, signifi cantly higher incidence rates of preeclampsia (49. 1 versus 19.1 %; p = 0.002) and caesarean section (89.1 versus 68.3 %; p = 0.017) were found. Neonatal morbidity and mortality rates were higher in vasculopathy group (but not statistically signifi cantly). Preparation for pregnancy improves perinatal and neonatal results. Nevertheless, this preparation in our study group was received only in 9.3 %. Perinatal mortality was 25.4 per 1,000 total births. CONCLUSION: For pregnancy of diabetic women to become possible a qualifi ed management must be provided. Good outcomes for both women and newborns are real when preparation for pregnancy and metabolic control before and during whole pregnancy are at adequate level (Tab. 3, Ref. 28). Text in PDF www.elis.sk.