In an oxazolone‐induced colitis model in 8 week old C57BL/6 mice, C‐section mice had more severe reactions to the challenge: For example, greater body weight and colon tissue weight losses, higher colon TNF‐α and colon immune cell infiltration, lower expression of the gut barrier‐associated genes occludin and tight junction protein 1 (Zachariassen, Hansen, et al., 2019). This evidence concerns the gene TNF and colitis.