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A study using 20 Holstein Friesian cows was conducted to investigate theinfluence of calf gender on metabolism during the transition period in dairycattle. Blood samples were collected at three time points: 2–4 daysprepartum (time 1), and 1 week and 2 weeks postpartum (time 2 and time3 respectively). Serum samples obtained were analysed for total proteins,albumin, urea, glucose, non-esterified fatty acids (NEFA) and β-hydroxybutyrate (BHB). Depending on the sex of the offspring, cows weredivided into two groups: Group 1 consisted of cows with heifer offspring(n = 12) and Group 2 consisted of cows with bull offspring (n = 8). Atwo-way repeated measures ANOVA and t tests for unpaired data were used toanalyse the pattern of studied parameters and differences between the twogroups. The results indicate differences in metabolic parameters between thetwo groups. These results highlight the importance of considering fetal sexas a factor that influences maternal metabolism during the early transitionperiod in dairy cows

Sex of offspring influences metabolism during early transition period in dairy cows