Negative correlation Positive correlation
  ≤ - 0.250 0.250 ≤ 0.500 <
Sperm conc. (104/mL) Fe, Mg, Pb, Zn P, Se, Sr, Tl Cr
Motility (%) Ba, Co, Mo Be, Ca, Hg, Mn, Se, Sr, Tl, Zn Cd, Cs, Ga, Li,
V, Y
Morphology (%) Ba, Co, Mo, Pb Cd, Cs, Cu, Ga, Li, P, Rb, Se, Sn, Tl, Y Ca, Cr, In, Mg, Pb, Sr, Zn
Volume (mL) Cu, Rb Cd, Cr, Li, P, Se, Tl  
Table 2: Summary of correlation among metals and sperm properties.