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Full-Text Articles in Medicine and Health Sciences
Low Pregnancy Rate In Dairy Cattle After Fixed Time Artificial Insemination Using Norgestomet + Pgf2Α + Ecg Program During The Hot And Humid Months In Thailand, Winai Kaewlamun, Junpen Suwimonteerabutr, Thitirat Chaimee, Prachin Virakul, Mongkol Techakumphu
Low Pregnancy Rate In Dairy Cattle After Fixed Time Artificial Insemination Using Norgestomet + Pgf2Α + Ecg Program During The Hot And Humid Months In Thailand, Winai Kaewlamun, Junpen Suwimonteerabutr, Thitirat Chaimee, Prachin Virakul, Mongkol Techakumphu
The Thai Journal of Veterinary Medicine
The present study was conducted to synchronize estrus and fixed time insemination in dairy cattle during the hot and humid months (July to November) in Thailand. Thirty-four cows and heifers were treated by using norgestomet+PGF2α+equine chorionic gonadotropin (eCG) program. Norgestomet was implanted subcutaneously at the back of the ear for 10 days. PGF2α was administered IM on day 8 and one injection of eCG was given on the day of implant removal. Fixed time artificial insemination(AI) were performed twice, at about 54-60 and 70-74 h, after the eCG injection. Blood samples were collected at 22 days after AI for progesterone …
Genetic Parameters Of Residual Energy Intake And Its Correlations With Other Traits In Holstein Dairy Cattle, Pouya Zamani, Seied Reza Miraei Ashtiani, Hosein Mohammadi
Genetic Parameters Of Residual Energy Intake And Its Correlations With Other Traits In Holstein Dairy Cattle, Pouya Zamani, Seied Reza Miraei Ashtiani, Hosein Mohammadi
Turkish Journal of Veterinary & Animal Sciences
Residual energy intake (REI) or residual feed intake (RFI), defined as the difference between actual energy intake, is predicted on the basis of requirements for maintenance, milk production, and body weight change of an animal. Genetic variation of REI and its relationships with dry matter intake, milk yield, fat corrected milk yield and milk fat, and protein yields was investigated using 3503 monthly records collected from 906 Holstein lactating cows. Variance components were estimated using univariate and multivariate animal models with the derivative-free approach of restricted maximum likelihood algorithm, fitting animal models with fixed effects of herd-year-season, parity number and …