As shown in Table 2, by partial Spearman correlation analysis, we found that serum PCSK9 levels were positively correlated with FPG (R = 0.251, P = 0.015), HbA1c (R = 0.275, P = 0.009), TC (R = 0.273, P = 0.010), and LDL-C (R = 0.326, P = 0.002) after adjustment of age and gestational age; we failed to observe any significant correlations between PCSK9 levels and other parameters (P > 0.05) in the GDM group. Here, PCSK9 is linked to gestational diabetes.