Changes in selected biochemical blood parameters
in dairy cows after administration of melatonin

Darul, K.; Kruczynska, H.

doi:10.22358/jafs/70524/2005

Cited by 3 publications

(3 citation statements)

References 6 publications

(12 reference statements)

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“…Also, melatonin has an effect on the insulin secretion from the pancreas gland (24). This result agrees with the observation by the authors (20,23,26) in Arabi ewes, female Marwai goats and dairy cows respectively.…”

Section: Discussionsupporting

confidence: 91%

The impact of melatonin administration on the fertility performance and several relating parameters during the breeding season in the Arabi ewes

Kassim¹,

Al-Rishdy²,

Al-Helou³

2019

IJVS

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A total of twenty-four healthy ewes aged between 2-3 years old and weighed about 35.09 kg of body weight were divided randomly into four groups (6 animals for each group). The first group included the non-treated control group, while the other three groups were subjected to various oral doses of melatonin 9 mg, 12 mg and 15 mg/head, respectively. All treatments were applied at 6 o'clock in the morning, to investigate the effect of treatment with melatonin during breeding season on reproductive performance and levels of some biochemical parameters in Arabi ewes from 1 May to 1 October 2017. Blood samples 7ml were collected after one hour of treatment and then monthly during the pregnancy months to determine the concentrations of biochemical parameters. After Postpartum, lambed ewes/lambs number, birth weight, placenta empty weight and cotyledon number were recorded. The results showed significant (P<0.05) improvement in reproductive performance (fertility percentage, twinning rate and the number of offspring) when ewes administrated melatonin at two doses (12 and 15 mg/ head). Also, melatonin administration caused significant (P<0.05) decrease in the concentrations of thyroxin, cortisol, and cholesterol. Conversely, there was a significant increase (P<0.05) in glucose concentration after 1 hour of treatment. The concentrations of thyroxin, cortisol, cholesterol, and vitamin C increased significantly (P<0.01) in early-gestation compared with mid and late-gestation, while the concentrations progesterone and glucose increased significantly (P<0.05) in midgestation compared with early and late-gestation. In conclusion, melatonin administration at doses 12 and 15 mg/ head improves ewe reproductive performance (fertility percentage, twinning rate and the number of born lambs). Additionally, the gestation stage has a negative effect on the concentrations of thyroxin, cholesterol and vitamin C.

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Section: Discussionsupporting

confidence: 91%

The impact of melatonin administration on the fertility performance and several relating parameters during the breeding season in the Arabi ewes

Kassim¹,

Al-Rishdy²,

Al-Helou³

2019

IJVS

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“…Increased erythrocyte count in blood of pregnant cows (compared to non-pregnant) was reported by Darul and Kruczyńska [2005]. Also, Krakowski [2003], found increased erythrocyte number in cows, in the second trimester of pregnancy.…”

Section: Resultsmentioning

confidence: 95%

“…At the end of pregnancy and during first months after parturition, dynamic adaptive changes in intensity of metabolic processes occur in a female body. These changes are connected with fetal growth rate, mammogenesis, onset of colostrum and milk production, with reproductive system regeneration and preparation for new fertilization and pregnancy [Darul and Kruczyńska 2005, Mordak 2009].…”

Section: Introductionmentioning

confidence: 99%

Analysis of changes in selected hematological parameters in blood from primiparous dairy cows during last trimester of pregnancy and first two months of lactation

Skrzypczak¹,

Kurpińska²,

Baziuk³

2023

Acta Sci. Pol. Zootech.

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Dynamic changes in an organism of heifers at the end of pregnancy, and in primiparous cows in early lactation, may imply changes in morphological parameters. Their evaluation may contribute to a better understanding of changes, occurring in an organism of pregnant and lactating young cows. Hence, the aim of the study was to investigate, analyze and evaluate the changes in hematological parameters of peripheral blood (RBC, MCV, HGB, MCH, MCHC, WBC, PLT and HCT) in pregnant heifers/primiparous cows, of Polish Holstein-Friesian of Black-and-White variety, during the last trimester of pregnancy and in the first two months of lactation, with particular emphasis on transition period. Blood parameters were analyzed with the use of analyzer: scil Vet abc Plus+ (HORIBA Medical), on the following dates: 90, 30, 14 and 7 days before parturition and 7, 14, 30 and 60 days after parturition. Results of the study indicate that the most abrupt changes were observed for hematocrit, erythrocyte count, leukocytes, thrombocytes and hemoglobin concentration in blood. Parameters of red blood cells, at the end of pregnancy and first two months of lactation, didn’t exhibit any statistically significant changes. Noteworthy, is the convergence of trends in hematocrit and hemoglobin during analyzed period. High and stable hematocrit at the end of pregnancy was due to the stable erythrocyte count in this period. Decrease in RBCs after calving, and lower values during first two months of lactation, caused postpartum decrease in hematocrit and its stabilization at a lower level. These observations denote indirectly changes in blood volume, during analyzed period, what is supported by: tendencies observed for hemoglobin concentration, and stable MCV and MCHC. Obtained results suggest high efficiency of homeostatic mechanisms in pregnant and lactating heifers/primiparous cows. Our results may be useful for comparative studies both in physiology and health disturbances research in cows during the pre and post-partum period.

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Evaluation of the influence of melatonin implants during the gestation period in sheep from a selenium-deficient region

Andrés¹,

Sánchez²,

Jiménez³

2009

ajvr

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Changes in selected biochemical blood parameters in dairy cows after administration of melatonin

Cited by 3 publications

References 6 publications

The impact of melatonin administration on the fertility performance and several relating parameters during the breeding season in the Arabi ewes

The impact of melatonin administration on the fertility performance and several relating parameters during the breeding season in the Arabi ewes

Analysis of changes in selected hematological parameters in blood from primiparous dairy cows during last trimester of pregnancy and first two months of lactation

Evaluation of the influence of melatonin implants during the gestation period in sheep from a selenium-deficient region

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