OBJECTIVES: To compare gestational weight gain (GWG) during pregnancy and obesity-related maternal morbidity between three months of the first year of the COVID-19 pandemic and three months of the previous year. METHODS: A retrospective comparative study was conducted in a tertiary university-affiliated hospital. GWG, obesity rates and pregnancy complications were compared between the time periods. RESULTS: Among women with class I obesity, GWG was higher during the pandemic ( CONCLUSIONS: Gestational weight gain increased during the pandemic, yet rates of obesity-related complications were notably fewer. This is likely attributed to decreased detection consequent to limited antenatal care.