We assessed the expression levels of inflammatory cytokines TNF‐α, IL‐1β, IL‐6, and MCP‐1 in the serum on GD 20.5 (using ELISA, Figure 4A) and placental tissues after the birth of the pups (using RT‐qPCR, Figure 4B) of GDM mice across different groups. This evidence concerns the gene CCL2 and gestational diabetes.