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Background: The gender gap in the authorship of scientific research may affect career advancement. Our aim was to assess the potential gender gap in gastrointestinal (GI) journals., Methods: A systematic review was performed of the GI literature and ongoing research in the period 2020-2022. A total 10 GI journals and ongoing research on clinicaltrials.gov were selected for review. The gender gap in first and senior authorship was evaluated for each article and ongoing research project. Associations between the gender gap and possible predictors were measured and results are presented as odds ratios (ORs) with 95%CI., Results: The number of first female authors (FFAs) and senior female authors (SFAs) in published articles were 1408/4207 (33.5%) and 911/4207 (21.7%), respectively. There were 781/2654 (29.4%) female principal investigators (PI)s for the ongoing research. On comparison of non-endoscopic vs. endoscopic topics, the latter were associated with the gender gap (hepatology, OR 2.15 [95%CI 1.83-2.55]; inflammatory bowel disease, OR 2.12 [95%CI 1.60-2.45]; upper and lower GI, OR 1.31 [95%CI 1.18-1.73]); as well as the type of article (original article vs. editorial, OR 1.92 [95%CI 1.58-2.33]). The type of research was also associated with the gender gap (clinical vs. preclinical studies, OR 0.88 [95%CI 0.66-0.91])., Conclusion: Our results demonstrated a correlation between the gender gap and the design and topic of the research. Future strategies for improving equity in career development in GI endoscopy should focus on closing the gender gap in equity of authorship., Competing Interests: The authors declare that they have no conflict of interest., (Thieme. All rights reserved.)