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327According to the nomenclature of semen recommended by WHO in 1992 8 semen sample were categorized as without spermatozoa Azoospermia motility less than 50 Asthenozoospermia sperm concentration less than 20 million ml and more than 250 million ml Oligozoospermia and polyzoospermia respectively Sperms having disturbed morphology of more than 30 of normal Teratozoospermia while the semen sample having progressive activity more than 25 percent overall motility 50 with sperm concentration within the range of 20 to 250 million ml were classified as normozoospermia RESULTS Seminal zinc were 702 92 10 60 598 48 12 95 617 54 9 55 710 36 7 87 and 762 06 8 99 in azoospermic oligozoospermic asthenozoospermic teratozoospermic and proven fathers group respectively Semen zinc was found several folds higher and highest values were recorded in case of polyzoospermic subjects In case of proven fathers the levels of semen zinc varied non significantly p 0 05 with polyzoospermia cases only DISCUSSION Sperm motility is significantly influenced by the element zinc Stiffening of the outer dense fibers by formation of disulfide bridges during epididymal sperm maturation seems to be an essential physiologic step for the generation of sperm motility especially progressive motility 9 Zinc deficiency has been linked with male sterility and sub fertility According to a study conducted in five middle aged men following a zinc restricted diet their sperm counts dropped from a mean of 283 million m to 45 million ml with 2 14 months 10 Male infertility induced by dietary zinc deficiency is not yet fully understood because of complexity of its mechanism however zinc is thought to be involved in several integrated processes associated with reproduction and has been reported that seminal zinc concentration was lower in patients with idiopathic sub fertility than in normal control 11 In another study it had been observed that geometric means of the seminal plasma zinc concentration was found to be significantly lower P 0 05 in the infertile group compared with those in the fertile group
