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Eighty infertile men and 38 men of known fertility were studied for investigation of both the importance of zinc, copper, cadmium, and lead to fertility and the possible interrelationships between these trace elements. The infertile men had higher mean concentrations of plasma copper than those of proven fertility. The difference was statistically significant (P less than 0.01) but was of small magnitude (approximately 1.5 mumol mean difference). The concentrations of plasma zinc, erythrocyte zinc, whole blood lead and cadmium, and seminal plasma zinc and copper did not differ significantly between infertile and fertile men. There was a significant positive relationship between sperm density and seminal plasma zinc concentration in the fertile, but not in the infertile, men. The infertile men with antisperm antibodies or counts greater than 20 million/ml had significantly higher mean levels of seminal plasma zinc than infertile men with oligospermia. The higher semen zinc in these two groups may reflect an abnormal fragility of the spermatozoa, resulting in the release of zinc, but the absence of significant overall differences between fertile and infertile men suggests that measurement of the concentration of zinc in plasma or zinc and copper in seminal plasma has little value in the routine investigation of infertility.
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
January 1990,
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R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
February 1987,
South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde,
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
January 1990,
Andrologia,
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
August 1988,
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R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
September 1986,
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R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
January 1973,
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R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
February 2009,
Nutrition research (New York, N.Y.),
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
January 1980,
International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics,
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
March 2020,
Maedica,
R Stanwell-Smith, and
S G Thompson, and
A P Haines, and
R J Ward, and
G Cashmore, and
J Stedronska, and
W F Hendry
January 1965,
Przeglad lekarski,
