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Figure 1b: Correlation matrix of sperm number, motility, morphology, semen volume and 10 metals (Fe –Pb). Correlations (r ≥ 0.2500) among sperm properties are colored in yellow and high correlations (r ≥ 0.5000) are colored in green. Negative correlations (r ≤ −0.2500) are colored in gray. |