And hepcidin (SMD -1.56, 95% CI -2.63 to -0.50, p = 0.004), transferrin (SMD 1.80, 95% CI 1.53 to 2.06, p < 0.00001), total iron-binding capacity (SMD 1.62, 95% CI 1.39 to 1.86, p < 0.00001), total cholesterol (SMD -0.88, 95% CI -1.68 to -0.09, p = 0.03), ferritin (WMD -52.68, 95% CI -62.68 to -42.67, p < 0.00001), transferrin saturation (SMD -5.57, 95% CI -7.47 to -3.68, p < 0.00001), and LDL-cholesterol (SMD -0.85, 95% CI -1.37 to -0.34, p = 0.01) showed statistical significance in NDD study. The gene discussed is TF; the disease is Neurodevelopmental delay.