Key result
Repeat breeding syndrome in dairy cows was associated with significantly higher total leukocyte counts and lower blood glucose levels compared to normal cyclic cows (p<0.05).
Why the study?
This study examined the association of hematological parameters, plasma glucose, and thyroid hormones with repeat breeding syndrome in cross-bred dairy cows reared under a semi-intensive system.
Are hematological parameters, blood glucose, and thyroid hormones associated with repeat breeding syndrome in dairy cows?
Case-Control (n=40)
Are hematological parameters, blood glucose, and thyroid hormones associated with repeat breeding syndrome in dairy cows?
p-value: p=<0.05
Hypoglycemia and leukocytosis are associated with repeat breeding syndrome in crossbred dairy cows.
Hypoglycemia and leukocytosis may flag repeat breeding risk in dairy cows; leaves open causal links and intervention value.
Background and Objective: A repeat breeder (RB) cow is not conceived after three consecutive inseminations.This study examined the association of Haemoglobin (Hb), packed cell volume (PCV), total erythrocytes count (TEC), total leukocytes count (TLC), plasma glucose and thyroid hormones (T3 and T4) with repeat breeding syndrome in cross-bred dairy cows reared under the semi-intensive system.Materials and Methods: Twenty crossbred multiparous, apparently healthy dairy cows with the age of 4-8 years and a body condition score of 2.5-3 were used.The animals were divided into two equal groups.Group A (n = 20) were healthy normal cyclic cows used as control.Group B (n = 20) were RB cows.Blood samples were collected once from all animals for measuring the Hb, PCV, TEC, TLC, glucose, T3 and T4.Results: When compared to the normal cyclic cows, no significant differences were detected (p>0.05) in the Hb, PCV, TEC, serum T3 and T4 in RB cows, but the TLC was significantly higher (8.2±0.5 vs 5.5±0.12103 mLG 1 , p<0.05) and the blood glucose level were significantly lower in the RB (44.9±5.0 vs. 54.6±6.5 mg dLG 1 , p<0.05).Conclusion: The hypoglycemia and leukocytosis were associated with repeat breeding syndrome in cross-dairy cows under the study.
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Ahmed et al. (2023) conducted a case-control in Repeat breeding syndrome (n=40). Repeat breeding syndrome vs. Healthy normal cyclic cows was evaluated on Hematological parameters, blood glucose, and thyroid hormones (p=<0.05). Repeat breeding syndrome in dairy cows was associated with significantly higher total leukocyte counts and lower blood glucose levels compared to normal cyclic cows (p<0.05).
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