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Caffeine and sperm motility.

M M Moussa

    Fertility and Sterility
    |June 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Caffeine at moderate doses (3 and 6 mM/ml) enhances human sperm motility. Higher concentrations inhibit sperm function, with complete immobilization occurring at 120 mM/ml, impacting male fertility potential.

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    Area of Science:

    • Reproductive Biology
    • Pharmacology

    Background:

    • Sperm motility is crucial for natural fertilization.
    • Understanding factors affecting sperm motility is vital for reproductive health.
    • Caffeine is a widely consumed stimulant with potential physiological effects.

    Purpose of the Study:

    • To investigate the dose-dependent effects of caffeine on human sperm motility parameters.
    • To assess the impact of caffeine on sperm velocity and progressive movement.

    Main Methods:

    • Utilized videomicrography for precise assessment of sperm motility.
    • Evaluated six different doses of caffeine ranging from 3 mM/ml to 120 mM/ml.
    • Measured percentage of sperm motility, swimming speed, percentage of progressive sperm, and progressive swimming speed.

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    Main Results:

    • Caffeine at 3 and 6 mM/ml significantly increased the percentage of motile sperm.
    • Sperm velocity remained unaffected by lower caffeine doses.
    • Higher doses (>6 mM/ml) showed initial stimulation followed by inhibition, leading to complete immobilization at 120 mM/ml.

    Conclusions:

    • Caffeine exhibits a biphasic effect on human sperm motility: stimulatory at low doses and inhibitory at high doses.
    • High caffeine concentrations pose a risk to sperm function and may impair male fertility.
    • Further research is needed to establish safe caffeine consumption levels for men aiming for conception.