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This is to certify that your paper entitled «The effect of folic acid and zinc sulfate supplementation on men's infertility: A systematic review» was indexed with 1 pages, in the CIVILICA citation database, code COI:SRCSRMED08_008, after evaluation and approval of the referees of the "The 8th Research Student Congress of the Southwest region of the country (Amashi region 4) and the 2nd Internal Conference of Shushtar Faculty of Medical Sciences and Health Care Services held in Shushtar 2023.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.