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

作者：Melendez Pedro^*; Gomez Veronica; Bothe Hans; Rodriguez Francisco; Velez Juan; Lopez Hernando; Bartolome Julian; Archbald Louis

来源：Journal of Veterinary Science, 2018, 19(3): 462-467.

DOI：10.4142/jvs.2018.19.3.462

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

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.

• 出版日期2018-5