Aim of the research: To determine the influence between the eating habits of pregnant women and weight gain in pregnancy, in the area of the city of Split. Research methods: The research was conducted through an anonymous survey questionnaire in June 2020 at the Clinic for Women's Diseases and Obstetrics in Split, at the Department of Midwifery. Forty respondents participated in the study. Results: The average age of the respondents was 30.7 years, and the average height was 1.69 m. Before pregnancy, 72% of the respondents had a BMI of 18.5 to 24.99, or normal nutrition. The average weight gain was 14.4 kg. At the end of pregnancy, 65% of pregnant women had increased body weight with a BMI of 25-29.99. 37.5% of women most often had 3 main meals and 3 snacks, the most consumed were proteins (92.5%), and the least consumed were nuts and cereals, 30%. 27% of the respondents were engaged in physical activity and recreation, 45% of women found the necessary information about their diet on the Internet, 66% of them took folic acid as a dietary supplement, and 12% of the respondents believe that they eat for two during pregnancy. Conclusion: Studying the results obtained by surveys, it can be concluded that the respondents, on average, had an optimal and satisfactory weight gain in pregnancy. Nevertheless, based on BMI, it was shown that most pregnant women had increased body weight at the end of pregnancy.