Objectives: To evaluate the nutritional status of low-risk pregnant women during prenatal, characterize the sociodemographic profile and quantify the patients with inadequate weight. Methods: Observational, prospective in low-risk pregnant women in Aracaju health centers, Sergipe, from March to June 2014. The evaluation followed the nutritional standards recommended by the Ministry of Health (MOH) and was conducted in three consultations consecutive, where the body mass index (BMI) was calculated by the researcher. Socioeconomic and gestational data of the patients were placed on a special form. Statistical analysis was performed using the EPI-INFO software, made distribution tables of frequencies and performed association testing variables. Results: 188 pregnant women were selected, of these 150 were eligible. The average age was 26 years, with standard deviation of 6.53. The average pre-pregnancy weight was 56.3 kg (± 20.8), average weights in the first, second and third reviews were 65.17 kg (± 12.8), 67.56 kg (± 12.9 ) and 69.97 kg (± 12.6), respectively. The pregnant woman’s card filling was incomplete in 63% of cases. In the pre-pregnancy period, 14% were malnourished and 14% obese. A significant association between BMI identified in the consultations and the inadequacy of pre-pregnancy BMI (p <0.01). Conclusions: Most of the women had BMI changed during the evaluations. Prenatal card filling proved inadequate, but there was no association with BMI during pregnancy. The factor related to pregnancy BMI change was the pre-pregnancy BMI inappropriate
