Abstract |
The objective of this study was to investigate cystic ovarian disease (COD) in commercial Japanese Black cows and to evaluate the efficacy of 7-day insertion of an intravaginal progesterone insert (CIDR) combined with prostaglandin F(2alpha) ( PGF(2alpha)) at CIDR removal. Experiment 1 was conducted to group cysts into 4 patterns based on alteration of plasma progesterone (P(4)) concentrations on d -7 and d 0 (=CIDR insertion) with 1.0 ng/ml as the cut-off level by ultrasonographic examination of 28 cows with COD that were >or=40 days postpartum and anoestrous after calving. In Experiment 2, a total of 55 cows under the same conditions as in Experiment 1 were utilized, and the same regimen as in Experiment 1 was performed without 7 days of pre-observation before treatment. As a result, 92.9% of CLs on d 21 were highly formed in Experiment 1 and 83.6% were highly formed in Experiment 2. The conception rates within 60 days after CIDR removal were also satisfactory high and were 71.4% and 54.5%, respectively. There were no differences in any overall reproductive parameters between Experiments 1 and 2 (P>0.05). The average days between CIDR removal and conception were 24.4 +/- 5.3 and 24.0 +/- 6.5 days, respectively (P>0.05); therefore, the conception dates of the cows in Experiment 2 were at least 7 days earlier compared with Experiment 1. In conclusion, treatment with a CIDR and PGF(2alpha) against COD could minimize the risk of incorrect treatment and provide sufficient reproductive performance in Japanese Black cows.
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Authors | Akihiro Iwakuma, Yoshihito Suzuki, Takashi Haneishi, Makoto Kajisa, Shunichi Kamimura |
Journal | The Journal of veterinary medical science
(J Vet Med Sci)
Vol. 70
Issue 10
Pg. 1077-83
(Oct 2008)
ISSN: 0916-7250 [Print] Japan |
PMID | 18981664
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
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Topics |
- Administration, Intravaginal
- Animals
- Cattle
- Cattle Diseases
(blood, diagnostic imaging, drug therapy)
- Dinoprost
(administration & dosage)
- Female
- Male
- Ovarian Cysts
(blood, diagnostic imaging, drug therapy, veterinary)
- Postpartum Period
- Pregnancy
- Progesterone
(administration & dosage, blood)
- Reproduction
(drug effects, physiology)
- Ultrasonography
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