Estrus response and fertility after a single cloprostenol treatment in dairy cows with various ovarian structures.

Abstract

The objective of this study was to determine rates of estrus and conception in lactating multiparous Holstein cows given 500 μg of cloprostenol intramuscularly after detection of the following ≥ 60 d after parturition: a solid corpus luteum (CL), a CL with a nonechodense cavity ≤ 20 mm in diameter (CLcav), a luteal cyst (cavity > 20 mm in diameter and a luteinized wall > 3 mm in diameter), or a follicular cyst (cavity > 20 mm and a luteinized wall ≤ 3 mm in diameter). The estrus rates were 335/419 (80.0%), 183/223 (82.1%), 170/182 (93.4%), and 44/87 (50.6%), respectively (P < 0.0001), and the conception rates 30 to 36 d after insemination among the estrous cows with an apparently normal mucus discharge were 130/285 (45.6%), 44/141 (31.2%), 39/79 (49.4%), and 19/30 (63.3%), respectively (P < 0.002). Compared with a solid CL, a CLcav did not affect the estrus rate but significantly reduced the conception rate (P < 0.05), and the estrus rates were significantly higher and lower in cows with a luteal or follicular cyst, respectively (P < 0.05).

• Authors: Csilla Hatvani, Orsolya G Balogh, Tamás Endrődi, Zsolt Abonyi-Tóth, István Holló, John P Kastelic, György Gábor
• Journal: Canadian journal of veterinary research = Revue canadienne de recherche veterinaire (Can J Vet Res) Vol. 77 Issue 3 Pg. 218-20 (Jul 2013) ISSN: 1928-9022 [Electronic] Canada
• PMID: 24101799 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Luteolytic Agents
• Cloprostenol

Topics

• Animals
• Cattle (physiology)
• Chi-Square Distribution
• Cloprostenol (administration & dosage)
• Corpus Luteum (diagnostic imaging, physiology)
• Estrus (drug effects, physiology)
• Female
• Insemination, Artificial (veterinary)
• Luteolytic Agents (administration & dosage)
• Postpartum Period
• Pregnancy
• Ultrasonography