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Alteration in Concentrations of Blood Urea Nitrogen and Sex Steroid Hormone in Korean Cattle with Reproductive Disorders  

Choe, Chang-Yong (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
Son, Dong-Soo (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
Cho, Sang-Rae (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
Kim, Hyun-Jong (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
Choi, Sun-Ho (Animal Genetic Resources Station, National Institute of Animal Science, RDA)
Kang, Da-Won (Department of Physiology, College of Medicine and Institute of Health Sciences, Gyeongsang National University)
Publication Information
Journal of Embryo Transfer / v.23, no.1, 2008 , pp. 59-64 More about this Journal
Abstract
The objective of this study is to investigate the changes in concentrations of blood urea nitrogen (BUN) and sex steroid hormones, such as estrogen, progesterone, and testosterone in Korean cattle (Hanwoo) with reproductive disorders and to examine the relationship between BUN and body condition score (BCS) in Hanwoo. The concentration of BUN was 16.2 mg/dl, 17.8 mg/dl, 15.1 mg/dl, 17.9 mg/dl, and 28.3mg/dl in pregnancy, repeat breeding, follicular cyst, luteal cyst, and ovarian atrophy, respectively. In Hanwoo with BCS $2.0{\sim}2.9$, $3.0{\sim}3.5$ and $3.6{\sim}4.0$, the concentration of BUN was 15.8 mg/dl, 17.0 mg/dl, and 17.6 mg/dl, respectively. Fluoroimmunoassay showed that serum estrogen and progesterone levels were decreased in reproductive disorders Hanwoo, such as ovarian atrophy, endometritis, and weak estrus. The testosterone level was significantly decreased in Hanwoo with reproductive disorders compared to that in pregnant Hanwoo ($0.02{\sim}0.03\;ng/ml$ vs 0.13 ng/ml, p<0.05). The progesterone and estrogen concentrations in follicular fluid obtained from ovary with follicular cyst were significantly higher (p<0.05) than those in normal follicle fluid. These results show that there is no relationship between BUN and BCS in Hanwoo, and the concentration of sex steroid hormone in serum and follicular fluid are changed in reproductive disorders Hanwoo.
Keywords
BUN; BCS; Hanwoo; hormone; reproductive disorder;
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Times Cited By KSCI : 6  (Citation Analysis)
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