On the other hand, Turek et al. [63] observed that SIRT1 mRNA expression in peripheral blood leucocytes was 1.7-fold higher in the GDM group compared with the NGT group, and it correlated positively with the OGTT results in the entire study group and correlated negatively with pregnancy age in the GDM and NGT groups. Here, SIRT1 is linked to gestational diabetes.