کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10891638 1082054 2016 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Alternative programs for synchronizing and resynchronizing ovulation in beef cattle
ترجمه فارسی عنوان
برنامه های جایگزین برای همگام سازی و دوباره سازی تخمک گذاری در گاو گوشتی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
Fixed-time artificial insemination (FTAI) has been regarded as the most useful method to increase the number of cows inseminated in a given herd. The main treatments for FTAI in beef cattle are based on the use of progesterone-releasing devices and GnRH or estradiol to synchronize follicle wave emergence, with a mean pregnancy per AI (P/AI) around 50%. However, more recent protocols based on GnRH (named 5-day Co-Synch) or estradiol (named J-Synch) that reduce the period of progesterone device insertion and extend the period from device removal to FTAI have been reported to improve P/AI in beef cattle. Furthermore, treatments to resynchronize ovulation for a second FTAI in nonpregnant cows have provided the opportunity to do sequential inseminations and achieve high P/AI in a breeding season, reducing or even eliminating the need for clean-up bulls. In summary, FTAI protocols have facilitated the widespread application of AI in beef cattle, primarily by eliminating the necessity of estrus detection in beef herds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theriogenology - Volume 86, Issue 1, 1 July 2016, Pages 388-396
نویسندگان
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