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Reactive oxygen species (ROS) have a powerful cytotoxic effect on spermatozoa and have been implicated in spermatozoal dysfunction and male infertility. gamma-Glutamyl transpeptidase (GGT) is essential to the metabolism of the antioxidant glutathione and, as such, is believed to be important in protecting spermatozoa against oxidative stress. The aims of(More)
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