Fig. 4From: The effects of vitamin and mineral supplementation on women with gestational diabetes mellitusForest plot of pooled MD in serum insulin of studies included. a Meta-analysis of the effects of vitamin and mineral supplementation on serum insulin in women with GDM (fixed-effects model); b The forest plot of serum insulin in subgroup analysis defined by the type of interventions (random-effects model). Mean difference, MD; gestational diabetes mellitus, GDMBack to article page