ORIGINAL_ARTICLE It is well known in cattle that reproductive disorders are intimately associated with low or high body condition score (BCS). However, little is known concerning the relationship between BCS and oxidative stress, particularly in the reproductive tract. Thus, the aim of the present study was to investigate the oxidative stress biomarkers according to cows BCS values in the plasma, ovaries, oviductal, follicular and uterine fluids. The study was conducted on 58 cows classified in four classes (1, 2, 3 and 4) of BCS varying from1-1.5, 2-2.5, 3-3.5 and 4-4.5, respectively. The genital tracts and plasma were collected from slaughtered cows and processed within 5h after slaughtering. The number of ovarian follicles was measured using ultrasonography and the oxidative stress was assessed by considering total antioxidant status (TAS), catalase activity (CAT), and thiobarbituric acid-reactive substances (TBARS). The results showed that follicles number was significantly affected by BCS; cows with medium BCS (3) presented higher number of follicles than cows with low or high BCS (<3 or >3). Overall, BCS affects significantly the oxidative stress status at different levels of the reproductive tract. Cows with medium BCS (3) showed the best oxidative status than those with low or high values (BCS <3 or >3). In conclusion, the current results suggest that reproductive disorders observed in cows with low or high BCS values could be mediated through oxidative stress affecting consequently the reproductive tract and finally compromising fertility outputs. https://macvetrev.mk/Files/Article/2020/10.2478/macvetrev-2020-0021/macvetrev-2020-0021.pdf 2020-10-15T09:00:00 93 101 10.2478/macvetrev-2020-0021 BCS oxidative status follicles number reproductive tract reproduction Amel Khaled false 1 Associated Laboratory in Marine and Aquaculture Ecosystems, Faculty of Nature AUTHOR Sofiane Boudjellaba false 2 National Higher Veterinary School, 16000, Alger, Algeria AUTHOR Takfarinas Idres false 3 National Higher Veterinary School, 16000, Alger, Algeria AUTHOR Yuva Bellik y.bellik@univ-bba.dz false 4 Department of Biology, Faculty of Nature and Life Sciences, University of Mohamed El Bachir El Ibrahimi, Bordj Bou Arreridj, 34000, Algeria LEAD_AUTHOR Mohammed Nait Mouloud false 5 Associated Laboratory in Marine and Aquaculture Ecosystems, Faculty of Nature and Life Sciences, University of Bejaia, 06000 Bejaia, Algeria AUTHOR Mokrane Iguer-Ouada false 6 Associated Laboratory in Marine and Aquaculture Ecosystems, Faculty of Nature and Life Sciences, University of Bejaia, 06000 Bejaia, Algeria AUTHOR Buckley, F., O'Sullivan, K., Mee, J.F., Evans, R.D., Dillon, P. 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