cells. This is reflected by significant increase of calcium expression (p<0,050) and followed with the decrease of acrosin expression in seven-week as well as fourteen-week groups. While cytoplasm calcium expression in fourteen-week group is significantly higher (p<0,050) than seven week group ; but acrosin expression in seven-week and fourteen-week groups don’t differ significantly (p>0,050). The 100-120mT ELF magnetic field exposure doesn’t influence calmodulin and cAMP expression have no significant different (p>0,050).

Based o n this research, we conclude the mechanism of acrosin expression decreases in BALB/c mice germinal cells after being exposured with 100-120 mT intensity ELF magnetic field has a correlation with the increase of cytoplasm calcium expression. This condition is the manifestation of deterioration of germinal cells function in synthesizing protein. The decrease of acrosin expression is perhaps o ne factor which plays a role in men’s interfility.

Key words: Extermely Low frequency magnetic field, cytoplasm calcium expression, calmodulin expression, cAMP expression and acrosin expresion.