Fig. 5From: Vitamin B12 status and folic acid/vitamin B12 related to the risk of gestational diabetes mellitus in pregnancy: a systematic review and meta-analysis of observational studiesForest plots (random effects model) of meta-analysis of cross-sectional studies on the association between the between folic acid/vitamin B12 ratio and GDM. The data in the graph are logarithmically convertedBack to article page