Ovarian responses and conception ability in cows with acidosis due to acetic acid administration
1992
Vinkler, A. | Dvorak, R. | Zendulka, I. | Kudlac, E. (Vysoka Skola Veterinarni, Brno (CSFR))
The effects of acetic acid administered at an amount of 300 to 600 g (5 to 10 mol) to the rumen of breeding cows, were investigated on ovulation, conception and progesterone levels in the blood and milk of cows with cloprostenol-induced (Oestrophan Spofa) oestrus at a dose of 500 microgram i.m. In the group of 15 cows exposed to the acetic acid load five cows got in calf after the first insemination (33.3 %), and 12 cows (80.0 %) after all inseminations in 37.6 days after cloprostenol administration, with the insemination index 1.67. In the control group (five cows) four cows (80.0 %) got in calf after the first insemination, in total all five breeding cows got in calf in 20.6 days after cloprostenol administration, with the insemination index 1.2. In the experimental group of 15 cows a clinical examination of ovaries on day 7 after insemination revealed ovulation disorders in eight cows, that means in 53.3 % of the animals. No ovulation disorders were observed in the control group of five cows. Progesterone levels in the blood showed high variability. In the group of cows administered acetic acid they were by more than a half lower (1.49; 0.67; 1.53 per ml) on days 7, 14 and 21 after insemination in comparison with the control group (3.35; 2.5; 3.38 ng per ml). The average progesterone levels in milk were 1.27 and 1.53 on day 7, 6.74 and 7.27 on day 14 and 3.52 and 11.85 ng per ml on day 21, respectively, the higher values applying to the control.
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