On the other hand, in the GDM group, the correlations of MCP‐1 with cord blood insulin (r: 0.745; P = .021) and GCT (r: 0.753; P = .019), became stronger, whereas its association with maternal HOMA‐IR (r: 0.638; P = .064) and prepregnancy BMI (r: 0.644; P = .061) followed a trend. The gene discussed is INS; the disease is gestational diabetes.