Pregnancy outcome of lactating dairy cows assigned for Presynch-Ovsynch synchronization program and inseminated either at detected standing heat or at scheduled fixed time
نویسندگان
چکیده
منابع مشابه
effect of three methods of estrus synchronization :ovsynch, cidr+ovsynch and presynch+ovsynch on the fertility of dairy cows
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متن کاملEffects 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 cows with different levels of BUN subjected to fixed-time artificial insemination (FTAI).Ovulatio...
متن کاملEfficacy of Three Synchronization Protocols on the Pregnancy Rate in Lactating Dairy Crossbred Cows after Fixed Time Artificial Insemination
Background and Objective: Ineffective estrus detection is the foremost limiting factor in the fertility of farmed cattle worldwide. Therefore, this study investigates the effect of three synchronization protocols with Fixed Time Artificial Insemination (FTAI) on the pregnancy rate of crossbred dairy cows. Methodology: Ninety one cows were assigned to four groups where the Body Condition Score (...
متن کاملProduction, Management and the Environment: Reproduction and Health Management
The objective was to evaluate whether addition of EAZI-BREED CIDR Cattle Inserts (CIDR) to the Ovsynch program increases first service pregnancy rate (PR) in lactating dairy cows. The study was conducted in 5 dairies in Central Mexico. Cows were inseminated from June through September, 2001. Within trial site and within parity, cows were assigned to either an Ovsynch (n=255) or an Ovsynch-CIDR ...
متن کاملProduction, Management and the Environment: Reproduction and Behavior
d before initiating treatments. Cows were blocked by lactation number and assigned randomly to 3 treatments consisting of variations of the Ovsynch protocol. Cows in Cosynch-48 and Ovsynch received injections of GnRH 7 d before and 48 h after a PGF injection. Fixed-time inseminations (TAI) were made at the time of the second GnRH injection (0 h; Cosynch-48) or 24 h (Ovsynch). Those in Cosynch-7...
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ژورنال
عنوان ژورنال: Asian Pacific Journal of Reproduction
سال: 2019
ISSN: 2305-0500
DOI: 10.4103/2305-0500.262835