THE RELATION OF SERUM UREA NITROGEN WITH STRADIOL AND PROGESTERONE LEVELS IN LACTATING COWS

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FARIVAR F.; KAFILZADEH F.

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Journal Paper

Paper Information

Journal: Journal of Agricultural Sciences and Natural Resources Year:2005 | Volume:12 | Issue:SUPPLEMENT (SPECIAL ISSUE ANIMAL SCIENCE) Page(s): 93-99

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Information Journal Paper

Title

THE RELATION OF SERUM UREA NITROGEN WITH STRADIOL AND PROGESTERONE LEVELS IN LACTATING COWS

Author(s)

FARIVAR F. | KAFILZADEH F. | Issue Writer Certificate

Keywords

SERUM UREAQ4

STEROID HORMONESQ4

PREGNANCY RATEQ4

DAIRY COWQ3

Abstract

This study was conducted to: I) investigate the relationships between SERUM UREA nitrogen concentrations (SUN) and serum STEROID HORMONES concentrations and 2) relate SUN to pregnancy in DAIRY COWs. Blood samples were collected at the day of insemination from 75 lactating cows of a dairy farm, which came into heat during a 4 weeks period. Forty-Five days after insemination, cows were determined to be either pregnant or non-pregnant. Average SUN concentrations of non-pregnant cows were significantly higher than those of pregnant cows (p<0.05). There were no significant differences between mean estradiol and progesterone concentrations of pregnant and non-pregnant cows. Also, based on SUN mean (15 mg/dl), cows were divided into two groups: 1- cows with SUN concentrations less than mean and 2- cows with SUN concentrations greater than mean. Progesterone concentrations between these groups were not significantly different. However, mean estradiol concentration of group 1 was significantly greater than those of group 2 (p<0.05). There was a significant correlation between SUN and estradiol concentrations (r=-0.43, p<0.05). The progesterone concentrations tended to increase (r= -0.23, p=0.06) as SUN concentrations increased. The observed negative effects of urea on fertility in this study may be mediated by effect on steroid concentration.

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APA: Copy

FARIVAR, F., & KAFILZADEH, F.. (2005). THE RELATION OF SERUM UREA NITROGEN WITH STRADIOL AND PROGESTERONE LEVELS IN LACTATING COWS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 12(SUPPLEMENT (SPECIAL ISSUE ANIMAL SCIENCE)), 93-99. SID. https://sid.ir/paper/9444/en

Vancouver: Copy

FARIVAR F., KAFILZADEH F.. THE RELATION OF SERUM UREA NITROGEN WITH STRADIOL AND PROGESTERONE LEVELS IN LACTATING COWS. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2005;12(SUPPLEMENT (SPECIAL ISSUE ANIMAL SCIENCE)):93-99. Available from: https://sid.ir/paper/9444/en

IEEE: Copy

F. FARIVAR, and F. KAFILZADEH, “THE RELATION OF SERUM UREA NITROGEN WITH STRADIOL AND PROGESTERONE LEVELS IN LACTATING COWS,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 12, no. SUPPLEMENT (SPECIAL ISSUE ANIMAL SCIENCE), pp. 93–99, 2005, [Online]. Available: https://sid.ir/paper/9444/en

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