EVALUATING A PROTOCOL FOR FIXED TIME ARTIFICIAL INSEMINATION USING TWO PROGESTERONE IMPLANTS IN CROSSBRED EWES RAISEDUNDER HEAT STRESS
نویسندگان
چکیده
منابع مشابه
Fixed-time artificial insemination in beef cattle
BACKGROUND The study was designed to test the effect of fixed-time artificial insemination (fixed-AI) after the slightly modified Ovsynch protocol on the pregnancy rate in beef cattle in Finnish field conditions. The modification was aimed to optimize the number of offsprings per AI dose. METHODS Ninety Charolais cows and heifers were entered into the program an average of 1.8 times. Thus, 16...
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 کاملEffects of progestagen exposure duration on estrus synchronization and conception rates of crossbreed ewes undergoing fixed time artificial insemination
Synchronization of estrus and ovulation are of paramount importance in modern livestock improvement programs. These methods are critical for assisted reproduction technologies, including artificial insemination and embryo transfer, that can increase productivity. In the current study, subcutaneous implants containing norgestomet were placed for long (14 days), medium (9 days), and short (5 days...
متن کاملEffect of progesterone concentration and duration of proestrus on fertility in beef cattle after fixed-time artificial insemination.
The objective was to determine the effect of plasma progesterone concentration and the duration of proestrus during growth of the ovulatory follicle on fertility in beef cattle. Heifers (N = 61) and postpartum cows (N = 79) were assigned randomly to four groups in a two-by-two design involving luteal-phase versus subluteal-phase plasma progesterone concentrations and normal versus short proestr...
متن کاملEffects of standing estrus and supplemental estradiol on changes in uterine pH during a fixed-time artificial insemination protocol.
Cows that exhibit estrus within 24 h of fixed-time AI have elevated concentrations of estradiol and greater pregnancy rates compared with cows not in estrus. Our objective was to determine whether estradiol, estrus, or both had an effect on uterine pH during a fixed-time AI protocol. Beef cows were treated with the CO-Synch protocol (100 mircog of GnRH on d -9; 25 mg of PGF(2alpha) on d -2; and...
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ژورنال
عنوان ژورنال: The Journal of Agriculture of the University of Puerto Rico
سال: 2019
ISSN: 2308-1759,0041-994X
DOI: 10.46429/jaupr.v103i1.17905