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Aims: This study analyzed major trends and topics in the field of gestational diabetes mellitus research between 2000 and 2020., Methods: Studies that investigated gestational diabetes mellitus published between 2000 and 2020 were retrieved from the Web of Science Core Collection database. Data from the identified studies were analyzed using CiteSpace software., Results: A total of 22,713 publications were retrieved, among which 21,722 publications were included in this scientometric analysis. Clustering analysis revealed 13 themes across all fields. Physical activity is an emerging trend. Co-word analysis showed that subject high-frequency keywords were: risk factor, obesity, insulin resistance, prevalence, and association. Centrality indices identified the most influential keywords to be: body mass index, risk factors, gestational weight gain, and obesity. Burst keywords revealed that there were six research frontier subtopics: i) prediction of adverse neonatal outcomes in gestational diabetes mellitus; ii) postpartum period research - blood glucose levels and insulin resistance; iii) meta-analysis - understanding the best evidence in pregnancy gestational diabetes mellitus; iv) gene expression profiles and DNA methylation in gestational diabetes mellitus; v) biomarkers for predicting higher birth and children weights; and vi) discussion on diagnostic criteria for gestational diabetes mellitus classification., Conclusion: The number of studies on gestational diabetes mellitus is increasing. For two decades, the United States has been the global leader in the number of published studies. Studies on gestational diabetes mellitus are mainly from developed countries, with a few of them being from developing countries. An emerging field of research aims at elucidating the association between physical activity and gestational diabetes mellitus., Competing Interests: The authors declare that they have no conflict of interest., (Thieme. All rights reserved.)