The Еffect of Season and Parity on the Reproductive Performance of Sows

Stanimir Dimitrov 1 , Vesna Karapetkovska-Hristova 2 , Ljupce Kochoski 2 , Biljana Trajkovska 2 , Borche Makarijoski 2 , Vesna Prodanovska-Poposka 2 , and Godswill Ntsomboh-Ntsefong 3
  • 1 Department of Genetics, Breeding and Reproduction, Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria
  • 2 Department of Biotechnology, Faculty of Biotechnical Sciences – Bitola, University „St. Kliment Ohridski”
  • 3 Institute of Agricultural Research for Development (IRAD-CEREPAH), , B. P. 243, Douala, Cameroon


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.

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