Figure 3 : Sub-group forest plot showing the meta-analysis outcomes of seminal plasma zinc between infertile and normal men.

From: Zinc levels in seminal plasma and their correlation with male infertility: A systematic review and meta-analysis

Figure 3

Abbreviations: IV: inverse variance; Random: random-effects model. Exclude XFR test: studies only included AAS and the chemical chromatometry test. Exclude chemical chromatometry test: studies only include AAS and XRF test.