Rowan et al. [34] compared treating GDM women with metformin (with supplemental insulin, if required, n = 363) to treatment with insulin alone (n = 370) and reported that triceps (5.2 ± 1.6 vs. 5.1 ± 1.2, p = 0.30) and subscapular (5.2 ± 1.5 vs. 5.2 ± 1.3, p = 0.60) SFT (mm) were not significantly different between the groups. Here, INS is linked to gestational diabetes.