Ultrasonographic ovarian dynamic, plasma progesterone, and non-esterified fatty acids in lame postpartum dairy cows
Journal of Veterinary Science
;
: 462-467, 2018.
Article
in English
| WPRIM
| ID: wpr-758807
ABSTRACT
The objective of this study was to compare ovulation rate, number of large ovarian follicles, and concentrations of plasma progesterone (P4) and non-esterified fatty acids (NEFA) between lame (n = 10) and non-lame (n = 10) lactating Holstein cows. The study was conducted in an organic dairy farm, and cows were evaluated by undertaking ultrasonography and blood sampling every 3 days from 30 days postpartum for a period of 34 days. Cows which became lame during the first 30 days postpartum experienced a lower ovulation rate determined by the presence of a corpus luteum (50% presence for lame cows and 100% for non-lame cows, p ≤ 0.05). The number of large ovarian follicles in the ovaries was 5 for lame cows and 7 for non-lame cows (p = 0.09). Compared to non-lame cows, lame cows had significantly lower (p ≤ 0.05) concentrations of plasma P4. Furthermore, NEFA concentrations were lower (p ≤ 0.05) in lame cows than in non-lame cows. It is concluded that lameness in postpartum dairy cows is associated with ovulation failure and lower concentrations of P4 and NEFA.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Ovary
/
Ovulation
/
Plasma
/
Progesterone
/
Ultrasonography
/
Corpus Luteum
/
Agriculture
/
Postpartum Period
/
Fatty Acids
/
Fatty Acids, Nonesterified
Type of study:
Diagnostic study
Language:
English
Journal:
Journal of Veterinary Science
Year:
2018
Type:
Article
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