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J Vet Sci 2018; 19(3): 462-467  https://doi.org/10.4142/jvs.2018.19.3.462
Ultrasonographic ovarian dynamic, plasma progesterone, and non-esterified fatty acids in lame postpartum dairy cows
Pedro Melendez1,*, Veronica Gomez2, Hans Bothe3, Francisco Rodriguez3, Juan Velez3, Hernando Lopez4, Julian Bartolome5, Louis Archbald2
1College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA
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
Correspondence to: Tel: +1-573-882-7821; Fax: +1-573-823-9383; E-mail: melendezp@missouri.edu
Received: March 27, 2017; Revised: February 1, 2018; Accepted: February 2, 2018; Published online: May 31, 2018.
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.
Keywords: lameness, non-esterified fatty acids, ovulation, postpartum dairy cows, progesterone

© 2018 The Korean Society of Veterinary Science.

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