Obesity is defined as the increased accumulation of adipose tissue in an organism, which is determined by genetic and environmental factors. Nowadays, this condition is most commonly found in women of child-bearing age, exhibiting short – as well as long-term effects on their health. Excessive body weight can affect the reproductive capability of women. In the case of pregnant women, a group characterized by a range of metabolic and hormonal disturbances, obesity may lead to functional impairment of the placenta, miscarriage, gestational diabetes, fetal macrosomia, and the need to complete the delivery by surgery. Obesity is one of the main causes of fertility disorders and obstetric failures. Due to fetal macrosomia and an increased risk of shoulder dystocia and obstetric injuries, the most common route of delivery in pregnancies complicated by obesity is Cesarean section, which often poses a challenge for the obstetric team. To reduce the number of obesity-complicated pregnancies, educating patients on undergoing laboratory testing, following a correct diet, and performing a physical activity is necessary. Actions aiming at reducing the body weight of pregnant women can enable reducing the risk of disturbances associated with pregnancy, labor, and puerperium, as well as having a positive impact on the future of the fetus and neonate.

Key words: obesity, pregnancy, labor, puerperium.