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This study was carried out to monitor the effect of oral supplementation of vitamin C on various semen parameters in oligospermic, infertile, otherwise healthy individuals. Various semen parameters, including sperm motility, sperm count, and sperm morphology, were studied before and after the vitamin C treatment. A total of 13 infertile patients were included. Their ages ranged between 25 and 35 years. They had no genital infection or varicocel. Physical examination and other routine laboratory investigations were normal. General semen analysis revealed oligozoospermia (mean sperm count was 14.3 ± 7.38 × 10⁶ sperms/mL, mean sperm with normal morphology was 43 ± 7.87%, and mean sperm motility was 31.2 ± 9.61%). Testicular biopsy was not done. These patients received in an open trial of 1,000 mg of vitamin C twice daily for a maximum of 2 months. Results showed that the mean sperm count was increased to 32.8 ± 10.3 × 10⁶ sperms/mL (P < .001) after 2 months of vitamin C intake. The mean sperm motility was increased significantly to 60.1 ± 8.47% (P < .001), and mean sperms with normal morphology increased significantly to 66.7 ± 4.77% (P < .001). This study showed that vitamin C supplementation in infertile men might improve sperm count, sperm motility, and sperm morphology and might have a place as an additional supplement to improve the semen quality towards conception.