Interestingly, MTNR1B rs10830963 and rs1387153 were reported to be linked to the risk of GDM in Korean women [28], as well, rs10830963 was recently found to be associated with beta-cell function in a Chinese pregnant Population [29], although both studies did not test the association of the MTNR1B variants with different gestational glucose levels and glucose intolerance. Here, MTNR1B is linked to gestational diabetes.