J Vet Sci.  2018 May;19(3):462-467. 10.4142/jvs.2018.19.3.462.

Ultrasonographic ovarian dynamic, plasma progesterone, and non-esterified fatty acids in lame postpartum dairy cows

Affiliations
  • 1College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA. melendezp@missouri.edu
  • 2College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA.
  • 3Aurora Organic Dairy Farm, Boulder, CO 80302, USA.
  • 4ABS Global, Inc., DeForest, WI 53532, USA.
  • 5Faculty of Veterinary Science, Universidad Nacional de La Pampa, General Pico L6360, Argentina.

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.

Keyword

lameness; non-esterified fatty acids; ovulation; postpartum dairy cows; progesterone

MeSH Terms

Agriculture
Corpus Luteum
Fatty Acids*
Fatty Acids, Nonesterified
Female
Mortuary Practice
Ovarian Follicle
Ovary
Ovulation
Plasma*
Postpartum Period*
Progesterone*
Ultrasonography
Fatty Acids
Fatty Acids, Nonesterified
Progesterone
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