Effects of eCG in Milking Dairy Cows with High Levels of BUN and Synchronized with Ovsynch Protocol

Effects of eCG in Milking Dairy Cows with High Levels of BUN and Synchronized with Ovsynch Protocol

Previous research indicates that high blood urea nitrogen (BUN) concentrations are associated with decreased fertility in lactating dairy cows.This experiment was done to evaluate the effects of equine chorionic gonadotropin (eCG) administration (with or without eCG) on fertility of lactating dairy...

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Veröffentlicht in:Biosciences, biotechnology research Asia biotechnology research Asia, 2016-06, Vol.13 (2), p.769-777
Hauptverfasser: Karami, F., Fallah Rad, A.H., Mesgaran, M. Danesh, Azizzadeh, M., Heidarpour, M.
Format: Artikel
Sprache:eng
Schlagworte:
Animal lactation
Artificial insemination
Blood
Cattle
Chorionic gonadotropin
Fertility
Gonadotropins
Milk
Milking
Nitrogen
Ovulation
Parturition
Pituitary (anterior)
Plasma
Pregnancy
Prostaglandins
Proteins
Reproduction (biology)
Time synchronization
Ultrasound
Urea
Ureas
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Zusammenfassung:Previous research indicates that high blood urea nitrogen (BUN) concentrations are associated with decreased fertility in lactating dairy cows.This experiment was done to evaluate the effects of equine chorionic gonadotropin (eCG) administration (with or without eCG) on fertility of lactating dairy cows with different levels of BUN subjected to fixed-time artificial insemination (FTAI).Ovulation was synchronized in all cows using Presynch-Ovsynch program and start 37 days post parturition(pp). Blood samples were collected on days 50-55 pp to assess BUN and cows were classified as with high urea when BUN was 20< ng/mL(n=64); otherwise, they were classified as cows with optimal urea when BUN was >10 and
ISSN:0973-1245
2456-2602
DOI:10.13005/bbra/2096