Ultrasonographic ovarian dynamic, plasma progesterone, and non-esterified fatty acids in lame postpartum dairy cows
| Autor: | Hernando Lopez, Francisco Rodriguez, Louis F. Archbald, Julian Bartolome, Veronica Gomez, H. Bothe, Pedro Melendez, Juan Velez |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Ovulation
lameness 040301 veterinary sciences media_common.quotation_subject Lameness Animal Cattle Diseases Fatty Acids Nonesterified progesterone 0403 veterinary science 03 medical and health sciences 0302 clinical medicine Animal science NEFA Ovarian Follicle postpartum dairy cows medicine Animals Ovarian follicle media_common Ultrasonography 030219 obstetrics & reproductive medicine General Veterinary business.industry non-esterified fatty acids food and beverages 04 agricultural and veterinary sciences medicine.anatomical_structure Lameness Plasma progesterone Cattle Female Original Article business Corpus luteum Blood sampling |
| Zdroj: | Journal of Veterinary Science |
| ISSN: | 1976-555X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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