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Molecular Human Reproduction, Vol. 5, No. 4, 331-337, April 1999
© 1999 European Society of Human Reproduction and Embryology

Zinc, magnesium and calcium in human seminal fluid: relations to other semen parameters and fertility

Michael Busk Sørensen1,4, Ingvar A. Bergdahl2, Niels Henrik I. Hjøllund3, Jens Peter E. Bonde3, Meredin Stoltenberg1 and Erik Ernst1

1 Laboratory of Reproductive Toxicology, Department of Neurobiology, Institute of Anatomy, University of Aarhus, DK-8000 Aarhus C, Denmark, 2 Department of Occupational Environmental Medicine, Institute of Laboratory Medicine, University of Lund, SE-221 85, Lund, Sweden and 3 Department of Occupational Medicine, Aarhus University Hospital, DK-8000 Aarhus C, Denmark

The effects of zinc, magnesium and calcium in seminal plasma on time-to-pregnancy (TTP) in healthy couples, on conventional semen parameters and computer-assisted semen analysis (CASA) parameters were evaluated. The localization of chelatable zinc ions in seminal plasma and spermatozoa were assessed by autometallography (AMG). Differences in chelatable zinc localization in samples with high and low total zinc were evaluated. Semen samples from 25 couples with short TTP and 25 couples with long TTP were subjected to conventional semen analysis, CASA, zinc and magnesium measurements by inductively coupled plasma mass spectrometry, and calcium by flame atomic absorption spectrometry. The cations were strongly inter-correlated, but no correlation with TTP or conventional semen parameters was found. Semen samples with high zinc concentrations exhibited statistically significant poorer motility assessed by the CASA parameters straight line velocity and linearity than samples with low zinc content. Calcium concentration also showed statistically significant differences for the same parameters, but the effect was removed by entering zinc concentration into a multiple regression model. Semen samples with high total zinc exhibited stronger staining of the seminal plasma at AMG. It is suggested that high seminal zinc concentrations have a suppressing effect on progressive motility of the spermatozoa (`quality of movement'), but not on percentage of motile spermatozoa (`quantity of movement').

autometallography/calcium/CASA/semen/spermatozoa/zinc

4 To whom correspondence should be addressed


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