The purpose of this study was to study the particularities of pregnancy in women with gestational diabetes mellitus and methods of delivery depending on body weight. Methods: The study included 366 pregnant women with gestational diabetes mellitus (GDM) who were delivered in the II quarter of 2019 - I quarter of 2020 in the maternity Department of The Moscow city clinical hospital No. 29 of the Moscow Department of health (gestation period – 37.0–41.0 weeks). Results: patients with GDM and obesity had significant weight gain during pregnancy, especially in the 1st and 2nd trimesters. Trimester weight gain in pregnant women with GDM and various degrees of obesity did not differ significantly. Correlation analysis showed that the higher the body weight of a mother with GDM, the higher the incidence of diabetic fetopathy (DF). The rate of delivery by caesarean section was much higher in the groups of patients with GDM and obesity than in normal-weight women with GDM. © 2020 EManuscript Technologies. All rights reserved.