Over the past few decades, overweight and obesity have been rising, with no signs of slowing down. In spite of being an important risk factor for the development of non-communicable diseases, these conditions can cause additional complications in pregnant women and, consequently, in their children.The aim of this review was to evaluate the prevalence of maternal obesity and overweight in the area of ​​Aveiro region.An observational, cross-sectional study was conducted. The population studied included pregnant women with one fetus, monitored in primary health care units', with weight and height records and who had not voluntarily terminated their pregnancy.Among the 2020 participants, the prevalence of overweight/obesity was 41.9%. Pre-gestational overweight and obesity were identified as significant predictors of pregnancy complications, particularly gestational diabetes, neonatal macrosomia, and increased likelihood of cesarean delivery.Maternal overweight and obesity remain highly prevalent and significantly impact pregnancy outcomes, increasing maternal–fetal morbidity. Our findings reinforce global trends and highlight the urgent need for preventive strategies in primary care. Early identification, nutritional counseling, and weight-management interventions are essential to reduce risks and improve long-term health for mothers and children.Pre-gestational overweight and obesity are associated with increased maternal-fetal morbidity, but these conditions are preventable and treatable. It is imperative the development of strategies to detain this recognized Public Health problem.