Figure 4 : Forest plot showing the meta-analysis outcomes of the effect of zinc supplementation on abnormal and normal sperm morphology.

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

Figure 4

Abbreviations: IV: inverse variance; Random: random-effects model. Normal (%): percent of normal morphology; abnormal (%): percent of abnormal morphology.