FABP4 and gestational diabetes: In 2021, a nested case–control study conducted in China on 135 women who developed GDM and 135 controls found that FABP4 levels were significantly higher in women who developed GDM compared with controls, both in the first trimester [53.3 (33.1~93.2) ng/L vs. 42.4 (32.6~63.8) ng/L] and in the second trimester [53.8 (36.8~94.1) ng/L vs. 41.6 (33.4~64.1) ng/L] [86].