ORIGINAL_ARTICLE The aim of this study was to analyze the effect of season and number of parity on the reproductive performance of sows kept on a commercial farm. To achieve this objective, 800 nrs productive parent sows and a total of 958 parities were analyzed. The results show that sow’s breeding season had a significant effect on the weaning-to-oestrus interval, the farrowing rate, the litter size and weaning piglets with positive results during autumn, winter and spring seasons. The number of parity has a significant effect on the weaning-to-oestrus interval, litter size and weaning piglets with acceptable values in sows with more farrowing. The results of this study on a pig farm with analysis which highlights the risk factors associated with reproductive performance of sows, could be used to improve sow farm practices. https://macvetrev.mk 2018-10-15T09:00:00 163 168 10.2478/macvetrev-2018-0019/Files/Article/2020/10.2478/macvetrev-2018-0019/macvetrev-2018-0019.pdf crossbreed sows reproductive parameters season parity Stanimir Dimitrov false 1 Department of Genetics, Breeding and Reproduction, Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria AUTHOR Vesna Karapetkovska Hristova v.primavera79@gmail. false 2 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski“, Republic of Macedonia LEAD_AUTHOR Ljupce Kochoski false 3 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski“, Republic of Macedonia AUTHOR Biljana Trajkovska false 4 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski“, Republic of Macedonia AUTHOR Borche Makarijoski false 5 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski“, Republic of Macedonia AUTHOR Vesna Prodanovska Poposka false 6 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski“, Republic of Macedonia AUTHOR Godswill Ntsomboh Ntsefong false 7 Institute of Agricultural Research for Development (IRAD-CEREPAH), B. 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